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Methods

apply

Copies properties from one object to another

Synopsis

glow.lang.apply(destination, source);

Parameters

destination

Type

Destination object

source

Type

Properties of this object will be copied onto a clone of destination

Returns

Example

var obj = glow.lang.apply({foo: "hello", bar: "world"}, {bar: "everyone"});
//results in {foo: "hello", bar: "everyone"}

clone

Deep clones an object / array

Synopsis

glow.lang.clone(Data);

Parameters

Data

Type

Object to clone

Returns

Example

var firstObj = { name: "Bob", secondNames: ["is","your","uncle"] };
var clonedObj = glow.lang.clone( firstObj );

extend

Copies the prototype of one object to another.

Synopsis

glow.lang.extend(sub, base, additionalProperties);

Parameters

sub

Type

Class which inherits properties.

base

Type

Class to inherit from.

additionalProperties

Type

An object of properties and methods to add to the subclass.

Description

The 'subclass' can also access the 'base class' via subclass.base

Example

function MyClass(arg) {
  this.prop = arg;
}
MyClass.prototype = {
  showProp: function() { alert(this.prop); }
};
function MyOtherClass(arg) {
  //call the base class's constructor
  arguments.callee.base.apply(this, arguments);
}
glow.lang.extend(MyOtherClass, MyClass, {
  setProp: function(newProp) { this.prop = newProp; }
});

var test = new MyOtherClass("hello");
test.showProp(); // alerts "hello"
test.setProp("world");
test.showProp(); // alerts "world"

hasOwnProperty

Cross-browser implementation

Synopsis

glow.lang.hasOwnProperty(obj, property);

Parameters

obj

Type

The object to check

property

Type

Property name

Returns

Returns false if a property doesn't exist in an object, or it was inherited from the object's prototype. Otherwise, returns true

Description

Safari 1.3 doesn't support , use this method instead.

interpolate

Replaces placeholders in a string with data from an object

Synopsis

glow.lang.interpolate(template, data, opts);

Parameters

template

Type

The string containing {placeholders}

data

Type

Object containing the data to be merged in to the template

The object can contain nested data objects and arrays, with nested object properties and array elements are accessed using dot notation. eg foo.bar or foo.0.

The data labels in the object cannot contain characters used in the template delimiters, so if the data must be allowed to contain the default { and } delimiters, the delimters must be changed using the option below.

opts

Type

Options object

delimiter

Alternative label delimiter(s) for the template

Type

Default

"{}"

Optional

Yes

The first character supplied will be the opening delimiter, and the second the closing. If only one character is supplied, it will be used for both ends.

Returns

Example

var data = {name: "Domino", colours: ["black", "white"], family:{mum: "Spot", dad: "Patch", siblings: []}};
var template = "My cat's name is {name}. His colours are {colours.0} & {colours.1}. His mum is {family.mum}, his dad is {family.dad} and he has {family.siblings.length} brothers or sisters.";
var result = glow.lang.interpolate(template, data);
//result == "My cat's name is Domino. His colours are black & white. His mum is Spot, his dad is Patch and he has 0 brothers or sisters."

map

Runs a function for each element of an array and returns an array of the results

Synopsis

glow.lang.map(array, callback, context);

Parameters

array

Type

Array to loop over

callback

Type

The function to run on each element. This function is passed three params, the array item, its index and the source array.

context

Type

Optional

Yes

The context for the callback function (the array is used if not specified)

Returns

Array containing one element for each value returned from the callback

Example

var weekdays = ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday"]
var weekdaysAbbr = glow.lang.map(weekdays, function (day) {
  return day.slice(0, 3).toLowerCase();
});
// returns ["mon", "tue", "wed", "thu", "fri"]

replace

Makes a replacement in a string.

Synopsis

glow.lang.replace(str, pattern, replacement);

Parameters

str

Type

Input string

pattern

Type

| RegExp

String or regular expression to match against

replacement

Type

|

String to make replacements with, or a function to generate the replacements

Returns

A new string with the replacement(s) made

Description

Has the same interface as the builtin String.prototype.replace method, but takes the input string as the first parameter. In general the native string method should be used unless you need to pass a function as the second parameter, as this method will work accross our supported browsers.

Example

var myDays = '1 3 6';
var dayNames = glow.lang.replace(myDays, /(\d)/, function (day) {
  return " MTWTFSS".charAt(day - 1);
});
// dayNames now contains "M W S"

toArray

Converts an array-like object to a real array

Synopsis

glow.lang.toArray(arrayLike);

Parameters

arrayLike

Type

Any array-like object

Returns

Example

var a = glow.lang.toArray(glow.dom.get("a"));

trim

Removes leading and trailing whitespace from a string

Synopsis

glow.lang.trim(str);

Parameters

str

Type

String to trim

Returns

String without leading and trailing whitespace

Example

glow.lang.trim("  Hello World  "); // "Hello World"