post: python pathlib

Author: Starslayerx

content/posts/2025-09-05_docker-images.md …25-09-05_docker-images-and-registries.mdcontent/posts/2025-09-05_docker-images.md renamed to content/posts/2025-09-05_docker-images-and-registries.md content/posts/2025-09-05_docker-images.md renamed to content/posts/2025-09-05_docker-images-and-registries.md

@@ -1,7 +1,7 @@
 +++
 date = '2025-09-17T8:00:00+08:00'
 draft = false
-title = 'Morden Javascript Tutorial Part 1- Fundamentals: 06~10'
+title = 'Morden Javascript Tutorial Part 2- Fundamentals: 06~10'
 tags = ['JavaScript']
 +++
 
@@ -579,6 +579,3 @@ We get these results because:
 **Avoid problems**  
 - Treat any comparison with `undefined/null` except the strict equality `===` with exceptional care.
 - Don't use comparisons `>= > < <=` with a variable which may be `null/undefined`, unless you're really sure of what you're doing. If a variable can have these values, check for them separately.
-
-
-

content/posts/2025-09-17_morden-js-fundamentals.md

@@ -1,7 +1,43 @@
 +++
 date = '2025-09-21T8:00:00+08:00'
 draft = true
-title = 'Morden Javascript Tutorial Part 1- Fundamentals: 11~15'
+title = 'Morden Javascript Tutorial Part 3- Fundamentals: 11~15'
 tags = ['Javascript']
 +++
 
+## 2.11 Logical operators
+There are four logical operators in JavaScript: `||` (ORA), `&&` (AND), `!` (NOT), `??` (Nullish Coalescing 空值合并).
+
+### || OR
+```JavaScript
+result = a || b
+```
+There are four logical combinations:
+```JavaScript
+alter( true || true );   // true
+alert( false || true );  // true
+alert( true || false );  // true
+alert( false || false ); // false
+```
+If an operand is not a boolean it's converted to be a boolean for the evaluation.
+```JavaScript
+if (1 || 0) { // works like (true || false)
+    alter('truthly!');
+}
+```
+
+#### OR "||" finds the first truthly value
+```JavaScript
+result = value1 || value2 || value3
+```
+The OR `||` operator does the following:
+- Evaluates operands from left to righit
+- For each operand, converts it to boolean. if the result is `true`, stops and returns the original value of that operand
+- If all operands are false, returns the last operand.
+
+```JavaScript
+alter( 1 || 0 ); // 1
+alter( null || 1 ); // 1
+alter( null || 0 || 1 ); // 1
+alter( undefined || null || 0 ); // 0 (all falsy)
+```