javascript - Object.Prototype Methods and 'Use Strict' in an IIFE (Immediately-Invoked Function Expression) -

-

the original code:

'use strict'; function gitjs(config) {     var defaults = {         inheriting: false,         clientid: undefined,         accesstoken: undefined,         baseurl: 'https://api.github.com',         mode: 'read'     };      this.config = $.extend(defaults, config); }  /**  * gets jquery method gitjs#generateapirequest going use send ajax request.  *  * @param {string} httpverb http verb request use,  * @return string  */ gitjs.prototype.getcommandmethod = function (httpverb) {     var method = $.get;      switch (httpverb) {     case 'get':         method = $.get;         break;     case 'post':         method = $.post;         break;     }     return method; };  ...

the new code:

(function() { 'use strict';     'use strict';     function gitjs(config) {         var defaults = {             inheriting: false,             clientid: undefined,             accesstoken: undefined,             baseurl: 'https://api.github.com',             mode: 'read'         };          this.config = $.extend(defaults, config);     }      /**      * gets jquery method gitjs#generateapirequest going use send ajax request.      *      * @param {string} httpverb http verb request use,      * @return string      */     gitjs.prototype.getcommandmethod = function (httpverb) {         var method = $.get;          switch (httpverb) {         case 'get':             method = $.get;             break;         case 'post':             method = $.post;             break;         }         return method;     };      ... }());

as code stands, when attempt:

var gitjs = new gitjs();

i told gitjs undefined

what hell thinking:

  • i don't want put use strict inside of every method.
  • i want code play nice if gets minified , concatenated file.
  • i want use .prototype syntax ease of inheritance later on (and code clarity)
  • i don't want make global var gitjs variable because overridden else's script.
  • i assume user invoke object constructor via new keyword

for record, know i'm wrong. way wrong. can't seem figure out flaw in thinking lies , i'd love guidance.

your problem gitjs private variable of invoked function. can't hide function in private scope , make publicly available @ same time. mutually exclusive goals.

therefore, want either explicitely set global variable, via window

var gitjs; (function() {     'use strict';      gitjs = function(){ ... }      ... }());

or return exported function inside iife.

var exportedgitjs = (function(){ //using different name clear...     'use strict';     var gitjs = function(){ ... }     ...     return gitjs; }());

ok, lied. can make javascript modules without having rely on global variables usualy means using different module-creation convention and/or using module library. highly recommend check out http://requirejs.org/ if interested in this.


Comments

Post a Comment

Popular posts from this blog

c# - SVN Error : "svnadmin: E205000: Too many arguments" -

-
i trying reposotries using c# code process svncommand = null; var psi = new processstartinfo("svnadmin"); psi.redirectstandardoutput = true; psi.redirectstandarderror = true; psi.useshellexecute = false; psi.arguments= @"dump c:\repositories\myrepo > c:\temp\myrepodumpfile.dump"; using (svncommand = process.start(psi)) { var myoutput = svncommand.standardoutput; var myerror = svncommand.standarderror; debug.write("output :" + environment.newline + environment.newline + myoutput.readtoend() + environment.newline + "error :" + environment.newline + environment.newline + myerror.readtoend()); svncommand.close(); } when use dump command commandline svnadmin dump c:\repositories\myrepo > c:\temp\myrepodumpfile.dump it works fine when try ...
Read more

c# - Copy ObservableCollection to another ObservableCollection -

-
how copy observablecollection item observablecollection without reference of first collection? here observablecollection item value changes affecting both collections. code private observablecollection<ratemodel> _allmetalrate = new observablecollection<ratemodel>(); private observablecollection<ratemodel> _metalrateondate = new observablecollection<ratemodel>(); public observablecollection<ratemodel> allmetalrate { { return this._allmetalrate; } set { this._allmetalrate = value; notifypropertychanged("metalrate"); } } public observablecollection<ratemodel> metalrateondate { { return this._metalrateondate; } set { this._metalrateondate = value; notifypropertychanged("metalrateondate"); } } foreach (var item in metalrateondate) allmetalrate.add(item); what causing , how can solve it? you need clone object referenced item before it's a...
Read more

All overlapping substrings matching a java regex -

-
is there api method returns (possibly overlapping) substrings match regular expression? for example, have text string: string t = 04/31 412-555-1235; , , have pattern: pattern p = new pattern("\\d\\d+"); matches strings of 2 or more characters. the matches are: 04, 31, 412, 555, 1235. how overlapping matches? i want code return: 04, 31, 41, 412, 12, 55, 555, 55, 12, 123, 1235, 23, 235, 35. theoretically should possible -- there obvious o(n^2) algorithm enumerates , checks substrings against pattern. edit rather enumerating substrings, safer use region(int start, int end) method in matcher . checking pattern against separate, extracted substring might change result of match (e.g. if there non-capturing group or word boundary check @ start/end of pattern). edit 2 actually, it's unclear whether region() expect zero-width matches. specification vague, , experiments yield disappointing results. for example: string line = "xx90xx"; strin...
Read more