diff options
Diffstat (limited to 'javascript.html.markdown')
| -rw-r--r-- | javascript.html.markdown | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/javascript.html.markdown b/javascript.html.markdown index 6234aebc..cb866886 100644 --- a/javascript.html.markdown +++ b/javascript.html.markdown @@ -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, // 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... -some_other_var = 10 +someOtherVar = 10 -// but your variable will always end up with the global scope, even if it wasn't -// defined there, so don't do it. +// ...but your variable will be created in the global scope, not in the scope +// 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. ["Hello", 45, true] @@ -133,7 +136,7 @@ myObj["my other key"] // = 4 // ... or using the dot syntax, provided the key is a valid identifier. 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 /*********** |