Programming/JavaScript/General Syntax - Revision history

Brodriguez: Add general note

2023-02-23T01:40:58Z

Add general note

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	* Variables are loosely typed.		* Variables are loosely typed.
	* Scope controlled at variable creation.		* Scope controlled at variable creation.
			* Default pass-by-reference.

	== Comments ==		== Comments ==

2023-02-22T23:01:45Z

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Revision as of 23:01, 22 February 2023

2023-02-22T22:59:51Z

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	{{ Note \| Common File Extensions: {{ ic \|.js}} }}		{{ Note \| Common File Extensions: {{ ic \|.js}} }}

			See also [[Programming/JavaScript/Objects and Data Structures \| Objects and Data Structures]]

2023-02-22T22:58:31Z

Export data structure section to separate page

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	For example:		For example:
	const myCondensedFunc = (name, age) => console.log(`I am ${name} and I am ${age} years old.`);		const myCondensedFunc = (name, age) => console.log(`I am ${name} and I am ${age} years old.`);


	~~== Basic Data Structures ==~~


	~~=== Arrays ===~~
	~~JavaScript arrays generally handle the same as standard arrays. See [[Arrays]] for more info.~~

	~~Additionally, JavaScript arrays have the following logic:~~

	~~Add item to start of array:~~
	~~<array_var>.unshift(<value>);~~

	~~Add item to end of array:~~
	~~<array_var>.push(<value>);~~

	~~Remove first item in array:~~
	~~removedValue = <array_var>.shift()~~

	~~Remove last item in array:~~
	~~removedValue = <array_var>.pop();~~

	~~Return shallow copy of array. Original array is left unchanged:~~
	~~arrayCopy = <array_var>.slice(<start_index>, <end_index>);~~

	~~Locate index of item in array. Or -1 if not found:~~
	~~index = <array_var>.indexOf(<value_to_search>, <opitonal_starting_index>);~~

	~~=== Dictionaries ===~~


	~~== Classes ==~~

2023-02-22T07:43:10Z

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 Note that the {{ ic |break}} statements are optional, but recommended. Removing a {{ ic |break}} statement will make the code execute into the next result section, instead of exiting the switch block.
 == Functions ==
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+  }
-Alternatively, a "condensed" format can be used if the function only needs a single line:
+Alternatively, a "condensed" format:
   const <function_name> = (<arg1>, <arg2>, ..., <argN>) => # Single line here;
 For example:
   const myCondensedFunc = (name, age) => console.log(`I am ${name} and I am ${age} years old.`);

2023-02-22T03:22:57Z

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Revision as of 03:22, 22 February 2023

2023-02-22T03:22:51Z

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Revision as of 03:22, 22 February 2023

2023-02-22T03:22:31Z

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Revision as of 03:22, 22 February 2023

2023-02-22T03:21:16Z

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Revision as of 03:21, 22 February 2023

2023-02-22T03:12:07Z

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   // Alternatively.
   console.log(`${myVar1} ${myVar2}`);
   // Combine two variables, then print the result.
   myVar3 = myVar1 + myVar2;
@@ Line 99: / Line 99: @@
   function() {
       let x = 5;
       // Can see x. y not declared yet.
       if (true) {
           let y = 2;
           // Can see x and y.
       } else {
           // Can see x, but not y.
+      }
       // Can see x, but not y.
+  }
@@ Line 119: / Line 119: @@
 == If Statements ==
 == Functions ==