Angularjs Learning Notes-tool methods

1.angular.bind (self, FN, args)

• Function: Returns a new function that binds this function to the self

• Parameters:
  Self: The context object for the new function

  fn: Functions that need to be bound

  Args: Arguments passed to a function

• Return value: This new function that points to self

varobj ={name:' xxx ', Print:function(country) {Console.log ( This. Name + ' is from ' +country); }};varSelf ={name:' YYY '};varBINDFN = Angular.bind (self, obj.print, ' China ');//var bindfn = Angular.bind (self, obj.print, [' China ']);Obj.print (' American ');//xxx is from AmericanBINDFN ();//yyy is from China

> Note: Bind will decide to invoke call or apply depending on your parameter type, so args can be either data or an array.

2.angular.copy (source, [destination])

• function: Deep copy of Object

• Parameters:
  Source: Origin Object

  Destination: Copied objects

• Return value: The copied object

var obj = {  ' Zuobaiquan ',  +}; var copyobj =//Object {name: "Zuobaiquan", age:20}

3.angular.equals (O1, O2)

• Function: Normal comparison and deep comparison of objects

• Parameters:
  O1: Objects to compare

  O2: Objects to compare

• Return Value: Boolean

// true // true // true // false

4.angular.extend (DST, SRC)

• Role: Expansion of objects

• Parameters:
  DST: An Extended object

  SRC: Source Object

• Return value: Extended Object

var dst = {name: ' xxx ', Country: ' China '};var src = {name: ' yyy ', age:10};angular.extend (DST, SRC); Console.log (SRC); Object {name: "yyy", Age:10}console.log (DST); Object {name: "yyy", Country: "China", age:10}//note here the name becomes "yyy" at this time

　　

5.angular.foreach (obj, iterator, [context])

• Role: Traversal of objects

• Parameters:
  Obj: Object

  Iterator: Iterative functions

  Context: Contexts in an iterative function

• return value: obj

var obj = {name: ' xxx ', Country: ' China '};angular.foreach (obj, function (value, key) {Console.log (key + ': ' + value);}); /name:xxx//country:chinavar array = [' xxx ', ' yyy '];angular.foreach (array, function (item, index) {console.log (index + '): ' + Item + ' from ' + this.country;}, obj.//0:xxx from china//1:yyy

　　

6.angular.fromjson (String)

• Function: String to JSON object
• Parameters:
  String: Strings
• Return value: JSON object

var json = Angular.fromjson (' {' name ': ' xxx ', ' age ': ') '; Console.log (JSON); Object {name: "xxx", age:34}

　　

7.angular.tojson (Json,pretty)

• Function: JSON object to String

• Parameters:
  Json:json

  Pretty:boolean number control string output format

• return value: String

Angular.tojson ({name: ' xxx '});//"{" name ":" XXX "}" Angular.tojson ({name: ' xxx '},true);/"{/"    name ":" XXX "//}" Angular.tojson ({name: ' xxx '},10);//"{//            " name ":" XXX "//}"

　　

8.angular.identity (value)

• Function: Returns the first argument of this function
• Parameters:
  Value: Parameter
• Return value: First parameter

Console.log (angular.identity (' xxx ', ' yyy ')); Xxx

　　

9.angular.isarray (value)

• Function: Determine whether a data is an array
• Parameters:
  Value: Data
• Return Value: Boolean

Angular.isarray (3); Falseangular.isarray ([]); Trueangular.isarray ([1, 2, 3]); Trueangular.isarray ({name: ' xxx '}); False

　　

10.angular.isdate (value)

• Function: Determine whether a data is a date type

• Parameters:
  Value: Data

• Return Value: Boolean

Angular.isdate (' 2012-12-02 '); Falseangular.isdate (New Date ()); True

　　

11.angular.isdefined (value)

• Function: Determine whether a data is a defined type

• Parameters:
  Value: Data

• Return Value: Boolean

angular.isdefined (undefined)//falseangular.isdefined ([]); True

　　

12.angular.isundefined (value)

• Function: Determine whether a data is a undefined type

• Parameters:
  Value: Data

• Return Value: Boolean

angular.isundefined (undefined)//trueangular.isundefined ([]); False

　　

13.angular.isfunction (value)

• Function: Determine whether a data is a function
• Parameters:
  Value: Data
• Return Value: Boolean

Angular.isfunction (function () {}); Trueangular.isfunction (3); False

　　

14.angular.isnumber (value)

• Function: Determine whether a data is a number type
• Parameters:
  Value: Data
• Return Value: Boolean

Angular.isnumber (4); Trueangular.isnumber (' xxx '); Falseangular.isnumber (new number (4)); Falseangular.isnumber (number (4)); True

　　

15.angular.isobject (value)

• Function: Determine whether a data is an object

• Parameters:
  Value: Data

• Return Value: Boolean

Angular.isobject (' xxx '); False      angular.isobject (null);//Falseangular.isobject ([]);//Trueangular.isobject (function () {});// Falseangular.isobject ({name: ' xxx '}); True

16.angular.isstring (value)

• Function: Determine whether a data is a string

• Parameters:
  Value: Data

• Return Value: Boolean

Angular.isstring (4); falseangular.isstring (' xxx '); Trueangular.isstring (new String (' xxx ')); Falseangular.isstring (String (' xxx ')); True

　　

17.angular.lowercase (String)

• Function: Lowercase the string uppercase

• Parameters:
  String: Strings

• Return value: The new string after the change

var newstring = angular.lowercase (' Xxyyzz '); Console.log (newstring); Xxyyzz

　　

18.angular.uppercase (String)

• function: capitalizes the lowercase letter of a string

• Parameters:
  String: Strings

• Return value: The new string after the change

var newstring = angular.uppercase (' Xxyyzz '); Console.log (newstring); Xxyyzz

　　

19.angular.noop ()

Function: null function

var flag = false;    Flag? Console.log (' xxx '): Angular.noop ();

　　

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Angularjs Learning Notes-tool methods