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build: add ESLint rule to disallow new Array(...)
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136 changes: 136 additions & 0 deletions
136
lib/node_modules/@stdlib/_tools/eslint/rules/no-new-array/README.md
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<!-- | ||
@license Apache-2.0 | ||
Copyright (c) 2025 The Stdlib Authors. | ||
Licensed under the Apache License, Version 2.0 (the "License"); | ||
you may not use this file except in compliance with the License. | ||
You may obtain a copy of the License at | ||
http://www.apache.org/licenses/LICENSE-2.0 | ||
Unless required by applicable law or agreed to in writing, software | ||
distributed under the License is distributed on an "AS IS" BASIS, | ||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
See the License for the specific language governing permissions and | ||
limitations under the License. | ||
--> | ||
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# no-new-array | ||
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> [ESLint rule][eslint-rules] disallowing the use of the `new Array()` constructor. | ||
<section class="intro"> | ||
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</section> | ||
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<!-- /.intro --> | ||
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<section class="usage"> | ||
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## Usage | ||
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```javascript | ||
var rule = require( '@stdlib/_tools/eslint/rules/no-new-array' ); | ||
``` | ||
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#### rule | ||
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[ESLint rule][eslint-rules] disallowing the use of the `new Array()` constructor. | ||
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**Bad**: | ||
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<!-- eslint-disable stdlib/no-new-array --> | ||
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```javascript | ||
var arr; | ||
var i; | ||
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arr = new Array( 5 ); | ||
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for ( i = 0; i < 5; i++ ) { | ||
arr[ i ] = i; | ||
} | ||
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console.log( arr ); | ||
// => [ 0, 1, 2, 3, 4 ] | ||
``` | ||
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**Good**: | ||
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```javascript | ||
var arr; | ||
var i; | ||
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arr = []; | ||
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for ( i = 0; i < 5; i++ ) { | ||
arr.push( i ); | ||
} | ||
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console.log( arr ); | ||
// => [ 0, 1, 2, 3, 4 ] | ||
``` | ||
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</section> | ||
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<!-- /.usage --> | ||
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<section class="examples"> | ||
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## Examples | ||
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```javascript | ||
var Linter = require( 'eslint' ).Linter; | ||
var rule = require( '@stdlib/_tools/eslint/rules/no-new-array' ); | ||
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var linter = new Linter(); | ||
var result; | ||
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var code = 'var arr = new Array( 5 );'; | ||
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linter.defineRule( 'no-new-array', rule ); | ||
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result = linter.verify( code, { | ||
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'rules': { | ||
'no-new-array': 'error' | ||
} | ||
}); | ||
/* returns | ||
[ | ||
{ | ||
'ruleId': 'no-new-array', | ||
'severity': 2, | ||
'message': 'Using the `new Array()` constructor is not allowed; use an array literal with push instead.', | ||
'line': 1, | ||
'column': 14, | ||
'nodeType': 'CallExpression', | ||
'source': 'var arr = new Array( 5 );', | ||
'endLine': 1, | ||
'endColumn': 25 | ||
} | ||
] | ||
*/ | ||
``` | ||
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<!-- /.examples --> | ||
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<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. --> | ||
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<section class="related"> | ||
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</section> | ||
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<!-- /.related --> | ||
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<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. --> | ||
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<section class="links"> | ||
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[eslint-rules]: https://eslint.org/docs/developer-guide/working-with-rules | ||
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</section> | ||
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<!-- /.links --> |
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lib/node_modules/@stdlib/_tools/eslint/rules/no-new-array/examples/index.js
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/** | ||
* @license Apache-2.0 | ||
* | ||
* Copyright (c) 2025 The Stdlib Authors. | ||
* | ||
* Licensed under the Apache License, Version 2.0 (the "License"); | ||
* you may not use this file except in compliance with the License. | ||
* You may obtain a copy of the License at | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, | ||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
* See the License for the specific language governing permissions and | ||
* limitations under the License. | ||
*/ | ||
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'use strict'; | ||
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var Linter = require( 'eslint' ).Linter; | ||
var rule = require( './../lib' ); | ||
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var linter = new Linter(); | ||
var result; | ||
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var code = 'var arr = new Array( 5 );'; | ||
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linter.defineRule( 'no-new-array', rule ); | ||
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result = linter.verify( code, { | ||
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'rules': { | ||
'no-new-array': 'error' | ||
} | ||
}); | ||
console.log( result ); | ||
/* => | ||
[ | ||
{ | ||
'ruleId': 'no-new-array', | ||
'severity': 2, | ||
'message': 'Using the `new Array()` constructor is not allowed; use an array literal with push instead.', | ||
'line': 1, | ||
'column': 14, | ||
'nodeType': 'CallExpression', | ||
'source': 'var arr = new Array( 5 );', | ||
'endLine': 1, | ||
'endColumn': 25 | ||
} | ||
] | ||
*/ |
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39
lib/node_modules/@stdlib/_tools/eslint/rules/no-new-array/lib/index.js
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/** | ||
* @license Apache-2.0 | ||
* | ||
* Copyright (c) 2025 The Stdlib Authors. | ||
* | ||
* Licensed under the Apache License, Version 2.0 (the "License"); | ||
* you may not use this file except in compliance with the License. | ||
* You may obtain a copy of the License at | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, | ||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
* See the License for the specific language governing permissions and | ||
* limitations under the License. | ||
*/ | ||
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'use strict'; | ||
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/** | ||
* ESLint rule disallowing the use of the `new Array()` constructor. | ||
* | ||
* @module @stdlib/_tools/eslint/rules/no-new-array | ||
* | ||
* @example | ||
* var rule = require( '@stdlib/_tools/eslint/rules/no-new-array' ); | ||
* | ||
* console.log( rule ); | ||
*/ | ||
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// MODULES // | ||
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var main = require( './main.js' ); | ||
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// EXPORTS // | ||
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module.exports = main; |
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lib/node_modules/@stdlib/_tools/eslint/rules/no-new-array/lib/main.js
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/** | ||
* @license Apache-2.0 | ||
* | ||
* Copyright (c) 2025 The Stdlib Authors. | ||
* | ||
* Licensed under the Apache License, Version 2.0 (the "License"); | ||
* you may not use this file except in compliance with the License. | ||
* You may obtain a copy of the License at | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, | ||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
* See the License for the specific language governing permissions and | ||
* limitations under the License. | ||
*/ | ||
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'use strict'; | ||
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// VARIABLES // | ||
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var rule; | ||
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// FUNCTIONS // | ||
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/** | ||
* Rule for disallowing the use of the `new Array()` constructor. | ||
* | ||
* @param {Object} context - ESLint context | ||
* @returns {Object} validators | ||
*/ | ||
function main( context ) { | ||
/** | ||
* Reports the error message. | ||
* | ||
* @private | ||
* @param {ASTNode} node - node to report | ||
*/ | ||
function report( node ) { | ||
context.report({ | ||
'node': node, | ||
'message': 'Using the `new Array()` constructor is not allowed; use an array literal with push instead.' | ||
}); | ||
} | ||
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/** | ||
* Checks whether a node is a `new Array()` expression. | ||
* | ||
* @private | ||
* @param {ASTNode} node - node to examine | ||
*/ | ||
function validate( node ) { | ||
if ( | ||
node.callee && | ||
node.callee.name === 'Array' | ||
) { | ||
report( node ); | ||
} | ||
} | ||
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return { | ||
'NewExpression': validate | ||
}; | ||
} | ||
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// MAIN // | ||
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rule = { | ||
'meta': { | ||
'type': 'suggestion', | ||
'docs': { | ||
'description': 'disallow the use of the `new Array()` constructor' | ||
}, | ||
'schema': [] | ||
}, | ||
'create': main | ||
}; | ||
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// EXPORTS // | ||
|
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module.exports = rule; |
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