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Tidy up section on variables, arrays and objects

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Adam Brenecki 2013-06-30 17:48:50 +09:30
parent 7c4bd7120c
commit c2d5429472
1 changed files with 8 additions and 5 deletions
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javascript.html.markdown
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@ -108,13 +108,16 @@ undefined // used to indicate a value that hasn't been set yet
// Variables are declared with the var keyword. Javascript is dynamically typed, // Variables are declared with the var keyword. Javascript is dynamically typed,
// so you don't need to specify type. Assignment uses a single = character. // so you don't need to specify type. Assignment uses a single = character.
var some_var = 5 var someVar = 5
// if you leave the var keyword off, you won't get an error... // if you leave the var keyword off, you won't get an error...
some_other_var = 10 someOtherVar = 10
// but your variable will always end up with the global scope, even if it wasn't // ...but your variable will be created in the global scope, not in the scope
// defined there, so don't do it. // you defined it in.
// Variables declared without being assigned to are set to undefined.
var someThirdVar // = undefined
// Arrays are ordered lists of values, of any type. // Arrays are ordered lists of values, of any type.
["Hello", 45, true] ["Hello", 45, true]
@ -133,7 +136,7 @@ myObj["my other key"] // = 4
// ... or using the dot syntax, provided the key is a valid identifier. // ... or using the dot syntax, provided the key is a valid identifier.
myObj.myKey // = "myValue" myObj.myKey // = "myValue"
// Objects are mutable, values can be changed and new keys added. // Objects are mutable; values can be changed and new keys added.
myObj.myThirdKey = true myObj.myThirdKey = true
/*********** /***********