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Merge pull request #51 from Axorax/main
Add JavaScript snippets
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‎public/data/javascript.json

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@@ -184,6 +184,96 @@
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],
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"tags": ["string", "whitespace"],
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"author": "axorax"
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},
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{
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"title": "Pad String on Both Sides",
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"description": "Pads a string on both sides with a specified character until it reaches the desired length.",
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"code": [
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"function padString(str, length, char = ' ') {",
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" const totalPad = length - str.length;",
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" const padStart = Math.floor(totalPad / 2);",
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" const padEnd = totalPad - padStart;",
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" return char.repeat(padStart) + str + char.repeat(padEnd);",
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"}",
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"",
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"// Example usage:",
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"console.log(padString('hello', 10, '*')); // Output: '**hello***'"
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],
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"tags": ["string", "pad", "manipulation"],
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"author": "axorax"
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},
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{
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"title": "Convert String to Snake Case",
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"description": "Converts a given string into snake_case.",
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"code": [
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"function toSnakeCase(str) {",
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" return str.replace(/([a-z])([A-Z])/g, '$1_$2')",
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" .replace(/\\s+/g, '_')",
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" .toLowerCase();",
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"}",
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"",
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"// Example usage:",
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"console.log(toSnakeCase('Hello World Test')); // Output: 'hello_world_test'"
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],
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"tags": ["string", "case", "snake_case"],
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"author": "axorax"
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},
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{
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"title": "Remove Vowels from a String",
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"description": "Removes all vowels from a given string.",
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"code": [
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"function removeVowels(str) {",
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" return str.replace(/[aeiouAEIOU]/g, '');",
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"}",
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"",
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"// Example usage:",
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"console.log(removeVowels('Hello World')); // Output: 'Hll Wrld'"
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],
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"tags": ["string", "remove", "vowels"],
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"author": "axorax"
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},
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{
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"title": "Mask Sensitive Information",
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"description": "Masks parts of a sensitive string, like a credit card or email address.",
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"code": [
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"function maskSensitiveInfo(str, visibleCount = 4, maskChar = '*') {",
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" return str.slice(0, visibleCount) + maskChar.repeat(Math.max(0, str.length - visibleCount));",
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"}",
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"",
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"// Example usage:",
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"console.log(maskSensitiveInfo('123456789', 4)); // Output: '1234*****'",
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"console.log(maskSensitiveInfo('[email protected]', 2, '#')); // Output: 'ex#############'"
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],
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"tags": ["string", "mask", "sensitive"],
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"author": "axorax"
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},
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{
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"title": "Extract Initials from Name",
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"description": "Extracts and returns the initials from a full name.",
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"code": [
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"function getInitials(name) {",
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" return name.split(' ').map(part => part.charAt(0).toUpperCase()).join('');",
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"}",
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"",
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"// Example usage:",
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"console.log(getInitials('John Doe')); // Output: 'JD'"
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],
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"tags": ["string", "initials", "name"],
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"author": "axorax"
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},
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{
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"title": "Convert Tabs to Spaces",
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"description": "Converts all tab characters in a string to spaces.",
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"code": [
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"function tabsToSpaces(str, spacesPerTab = 4) {",
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" return str.replace(/\\t/g, ' '.repeat(spacesPerTab));",
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"}",
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"",
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"// Example usage:",
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"console.log(tabsToSpaces('Hello\\tWorld', 2)); // Output: 'Hello World'"
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],
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"tags": ["string", "tabs", "spaces"],
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"author": "axorax"
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}
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]
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},
@@ -251,6 +341,206 @@
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],
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"tags": ["javascript", "array", "unique", "utility"],
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"author": "realvishalrana"
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},
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{
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"title": "Merge Objects Deeply",
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"description": "Deeply merges two or more objects, including nested properties.",
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"code": [
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"function deepMerge(...objects) {",
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" return objects.reduce((acc, obj) => {",
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" Object.keys(obj).forEach(key => {",
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" if (typeof obj[key] === 'object' && obj[key] !== null) {",
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" acc[key] = deepMerge(acc[key] || {}, obj[key]);",
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" } else {",
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" acc[key] = obj[key];",
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" }",
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" });",
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" return acc;",
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" }, {});",
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"}",
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"",
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"// Usage:",
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"const obj1 = { a: 1, b: { c: 2 } };",
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"const obj2 = { b: { d: 3 }, e: 4 };",
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"console.log(deepMerge(obj1, obj2)); // Output: { a: 1, b: { c: 2, d: 3 }, e: 4 }"
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],
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"tags": ["javascript", "object", "merge", "deep"],
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"author": "axorax"
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},
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{
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"title": "Omit Keys from Object",
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"description": "Creates a new object with specific keys omitted.",
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"code": [
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"function omitKeys(obj, keys) {",
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" return Object.fromEntries(",
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" Object.entries(obj).filter(([key]) => !keys.includes(key))",
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" );",
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"}",
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"",
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"// Usage:",
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"const obj = { a: 1, b: 2, c: 3 };",
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"console.log(omitKeys(obj, ['b', 'c'])); // Output: { a: 1 }"
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],
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"tags": ["javascript", "object", "omit", "utility"],
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"author": "axorax"
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},
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{
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"title": "Convert Object to Query String",
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"description": "Converts an object to a query string for use in URLs.",
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"code": [
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"function toQueryString(obj) {",
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" return Object.entries(obj)",
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" .map(([key, value]) => encodeURIComponent(key) + '=' + encodeURIComponent(value))",
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" .join('&');",
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"}",
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"",
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"// Usage:",
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"const params = { search: 'test', page: 1 };",
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"console.log(toQueryString(params)); // Output: 'search=test&page=1'"
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],
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"tags": ["javascript", "object", "query string", "url"],
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"author": "axorax"
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},
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{
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"title": "Flatten Nested Object",
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"description": "Flattens a nested object into a single-level object with dot notation for keys.",
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"code": [
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"function flattenObject(obj, prefix = '') {",
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" return Object.keys(obj).reduce((acc, key) => {",
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" const fullPath = prefix ? `${prefix}.${key}` : key;",
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" if (typeof obj[key] === 'object' && obj[key] !== null) {",
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" Object.assign(acc, flattenObject(obj[key], fullPath));",
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" } else {",
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" acc[fullPath] = obj[key];",
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" }",
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" return acc;",
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" }, {});",
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"}",
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"",
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"// Usage:",
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"const nestedObj = { a: { b: { c: 1 }, d: 2 }, e: 3 };",
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"console.log(flattenObject(nestedObj)); // Output: { 'a.b.c': 1, 'a.d': 2, e: 3 }"
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],
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"tags": ["javascript", "object", "flatten", "utility"],
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"author": "axorax"
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},
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{
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"title": "Pick Keys from Object",
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"description": "Creates a new object with only the specified keys.",
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"code": [
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"function pickKeys(obj, keys) {",
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" return Object.fromEntries(",
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" Object.entries(obj).filter(([key]) => keys.includes(key))",
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" );",
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"}",
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"",
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"// Usage:",
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"const obj = { a: 1, b: 2, c: 3 };",
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"console.log(pickKeys(obj, ['a', 'c'])); // Output: { a: 1, c: 3 }"
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],
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"tags": ["javascript", "object", "pick", "utility"],
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"author": "axorax"
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},
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{
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"title": "Check if Object is Empty",
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"description": "Checks whether an object has no own enumerable properties.",
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"code": [
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"function isEmptyObject(obj) {",
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" return Object.keys(obj).length === 0;",
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"}",
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"",
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"// Usage:",
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"console.log(isEmptyObject({})); // Output: true",
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"console.log(isEmptyObject({ a: 1 })); // Output: false"
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],
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"tags": ["javascript", "object", "check", "empty"],
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"author": "axorax"
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},
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{
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"title": "Invert Object Keys and Values",
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"description": "Creates a new object by swapping keys and values of the given object.",
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"code": [
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"function invertObject(obj) {",
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" return Object.fromEntries(",
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" Object.entries(obj).map(([key, value]) => [value, key])",
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" );",
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"}",
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"",
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"// Usage:",
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"const obj = { a: 1, b: 2, c: 3 };",
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"console.log(invertObject(obj)); // Output: { '1': 'a', '2': 'b', '3': 'c' }"
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],
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"tags": ["javascript", "object", "invert", "utility"],
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"author": "axorax"
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},
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{
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"title": "Clone Object Shallowly",
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"description": "Creates a shallow copy of an object.",
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"code": [
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"function shallowClone(obj) {",
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" return { ...obj };",
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"}",
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"",
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"// Usage:",
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"const obj = { a: 1, b: 2 };",
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"const clone = shallowClone(obj);",
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"console.log(clone); // Output: { a: 1, b: 2 }"
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],
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"tags": ["javascript", "object", "clone", "shallow"],
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"author": "axorax"
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},
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{
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"title": "Count Properties in Object",
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"description": "Counts the number of own properties in an object.",
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"code": [
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"function countProperties(obj) {",
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" return Object.keys(obj).length;",
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"}",
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"",
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"// Usage:",
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"const obj = { a: 1, b: 2, c: 3 };",
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"console.log(countProperties(obj)); // Output: 3"
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],
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"tags": ["javascript", "object", "count", "properties"],
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"author": "axorax"
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},
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{
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"title": "Compare Two Objects Shallowly",
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"description": "Compares two objects shallowly and returns whether they are equal.",
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"code": [
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"function shallowEqual(obj1, obj2) {",
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" const keys1 = Object.keys(obj1);",
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" const keys2 = Object.keys(obj2);",
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" if (keys1.length !== keys2.length) return false;",
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" return keys1.every(key => obj1[key] === obj2[key]);",
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"}",
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"",
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"// Usage:",
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"const obj1 = { a: 1, b: 2 };",
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"const obj2 = { a: 1, b: 2 };",
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"const obj3 = { a: 1, b: 3 };",
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"console.log(shallowEqual(obj1, obj2)); // Output: true",
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"console.log(shallowEqual(obj1, obj3)); // Output: false"
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],
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"tags": ["javascript", "object", "compare", "shallow"],
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"author": "axorax"
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},
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{
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"title": "Freeze Object",
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"description": "Freezes an object to make it immutable.",
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"code": [
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"function freezeObject(obj) {",
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" return Object.freeze(obj);",
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"}",
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"",
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"// Usage:",
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"const obj = { a: 1, b: 2 };",
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"const frozenObj = freezeObject(obj);",
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"frozenObj.a = 42; // This will fail silently in strict mode.",
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"console.log(frozenObj.a); // Output: 1"
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],
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"tags": ["javascript", "object", "freeze", "immutable"],
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"author": "axorax"
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}
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]
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},
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"utility"
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],
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"author": "Yugveer06"
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},
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{
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"title": "Get Current Timestamp",
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"description": "Retrieves the current timestamp in milliseconds since January 1, 1970.",
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"code": [
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"const getCurrentTimestamp = () => Date.now();",
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"",
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"// Usage:",
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"console.log(getCurrentTimestamp()); // Output: 1691825935839 (example)"
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],
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"tags": ["javascript", "date", "timestamp", "utility"],
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"author": "axorax"
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},
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{
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"title": "Check Leap Year",
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"description": "Determines if a given year is a leap year.",
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"code": [
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"const isLeapYear = (year) => (year % 4 === 0 && year % 100 !== 0) || year % 400 === 0;",
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"",
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"// Usage:",
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"console.log(isLeapYear(2024)); // Output: true",
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"console.log(isLeapYear(2023)); // Output: false"
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],
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"tags": ["javascript", "date", "leap-year", "utility"],
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"author": "axorax"
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},
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{
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"title": "Add Days to a Date",
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"description": "Adds a specified number of days to a given date.",
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"code": [
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"const addDays = (date, days) => {",
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" const result = new Date(date);",
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" result.setDate(result.getDate() + days);",
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" return result;",
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"};",
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"",
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"// Usage:",
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"const today = new Date();",
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"console.log(addDays(today, 10)); // Output: Date object 10 days ahead"
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],
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"tags": ["javascript", "date", "add-days", "utility"],
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"author": "axorax"
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},
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{
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"title": "Start of the Day",
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"description": "Returns the start of the day (midnight) for a given date.",
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"code": [
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"const startOfDay = (date) => new Date(date.setHours(0, 0, 0, 0));",
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"",
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"// Usage:",
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"const today = new Date();",
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"console.log(startOfDay(today)); // Output: Date object for midnight"
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],
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"tags": ["javascript", "date", "start-of-day", "utility"],
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"author": "axorax"
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},
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{
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"title": "Get Days in Month",
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"description": "Calculates the number of days in a specific month of a given year.",
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"code": [
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"const getDaysInMonth = (year, month) => new Date(year, month + 1, 0).getDate();",
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"",
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"// Usage:",
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"console.log(getDaysInMonth(2024, 1)); // Output: 29 (February in a leap year)",
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"console.log(getDaysInMonth(2023, 1)); // Output: 28"
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],
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"tags": ["javascript", "date", "days-in-month", "utility"],
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"author": "axorax"
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},
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{
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"title": "Get Day of the Year",
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"description": "Calculates the day of the year (1-365 or 1-366 for leap years) for a given date.",
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"code": [
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"const getDayOfYear = (date) => {",
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" const startOfYear = new Date(date.getFullYear(), 0, 0);",
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" const diff = date - startOfYear + (startOfYear.getTimezoneOffset() - date.getTimezoneOffset()) * 60 * 1000;",
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" return Math.floor(diff / (1000 * 60 * 60 * 24));",
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"};",
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"",
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"// Usage:",
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"const today = new Date('2024-12-31');",
702+
"console.log(getDayOfYear(today)); // Output: 366 (in a leap year)"
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],
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"tags": ["javascript", "date", "day-of-year", "utility"],
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"author": "axorax"
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}
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]
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},

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