logo
down
shadow

Using bind to force the context of a prototype function


Using bind to force the context of a prototype function

By : user2954957
Date : November 22 2020, 10:33 AM
should help you out Bar is definitely less efficient than Foo but not in terms of time complexity. Instead, it's less efficient in terms of memory consumption since each instance of Bar will now have a UNIQUE and NEW 'greet' function object (the 'bind' function creates a new function object).
Looking at your code, it actually becomes slightly convoluted to even have the 'greet' function on Bar.prototype. Instead, this works as well:
code :
function Bar(myName) {
  this.firstName = myName;
  this.greet = greet.bind(this);
}

var greet = function(yourName) {
  alert("Hello, " + yourName + ". I am " + this.firstName + ".");
};

var happy = new Bar("Happy");
var happyGreet = happy.greet;
happyGreet("Denny");
console.log( greet === happyGreet );


Share : facebook icon twitter icon
How to call a prototype function inside another prototype function without losing context

How to call a prototype function inside another prototype function without losing context


By : Santhosh Sampath
Date : March 29 2020, 07:55 AM
wish of those help I have this CODE: , Just use this:
code :
this.myFunc();
How do I create a prototype function that binds another prototype function as syntactic sugar (and keep the context of t

How do I create a prototype function that binds another prototype function as syntactic sugar (and keep the context of t


By : Anjan Bachhu
Date : March 29 2020, 07:55 AM
it helps some times Bind is not what you want.
Bind is designed to create a function that wraps a this pointer (which must exist when Bind is called), to avoid having to write lots of temporary functions like
code :
var that = this;
callMeBack(function() { that.callback(); });
callMeBack(this.callback.Bind(this));
var A = function() { ... };
function A { ... }
Snippet usefulness - Function.prototype.call.bind(Function.prototype.bind)

Snippet usefulness - Function.prototype.call.bind(Function.prototype.bind)


By : user3045088
Date : March 29 2020, 07:55 AM
like below fixes the issue Judging by the blog post, there is no 'usefulness' except syntactic sugar, turning:
code :
slice.call([1,2,3], 0, 1);
slice.apply([1,2,3], [0,1]);
slice([1,2,3], 0, 1);
How can I bind the 'this' context correctly on a prototype.object?

How can I bind the 'this' context correctly on a prototype.object?


By : Alexander Power
Date : March 29 2020, 07:55 AM
Hope that helps The value of this is decided at call time, by how the function is called. You want to bind to test (the instance), not Test (the constructor function).
If you don't want to make specific call-time adjustments but instead pre-bind the function to the test instance, that can obviously not happen before you have an instance, and it must happen for each instance individually. Hence the only solution to this is:
code :
function Test() {
    this.special = {
        start: (function () { ... }).bind(this)
    };
}
function Test() {
    this.special = {
        start: this._start.bind(this)
    };
}

Test.prototype._start = function () { ... };
Calling native bind function ( Function.prototype.bind ) without a context argument

Calling native bind function ( Function.prototype.bind ) without a context argument


By : Manpreet Kaur
Date : March 29 2020, 07:55 AM
around this issue You'll need to create your own binder function to do that. The main reason for having .bind() was to deal with the non-lexically defined this. As such, they didn't provide any way to use it without setting this.
Here's a simple example you could use:
Related Posts Related Posts :
  • RangeError: Maximum call stack size exceeded with array.slice
  • node rest client get with local variable
  • If condition not executes while mouse move fastly
  • Count the number of displayed elements in a HTML list
  • Locate JavaScript source code in Emacs
  • Clean, Modular Code vs MV* Frameworks
  • infinite scroll without loading image
  • Backbone: reverse collection order with comparator
  • What do printers ignore?
  • jQuery UI .tabs() Contentless tab?
  • Execute Javascript alert() after page (visually) loaded
  • JavaScript - duplicating array doesn't work
  • Excessive clickable area below image
  • JavaScript Regex: Replace |b| with <b>
  • Unexpected value change in 2D array in JavaScript
  • Function doesnt see parameter as a array of objects
  • jQuery fetch keypress event on chrome and IE
  • How to enable jquery validate localization?
  • Cassandra map collection returned by node.js Helenus looks odd
  • angular ng-repeat with multiple filter options
  • Selecting Children without ID or Class names
  • How to uncheck a group of checkboxes when another checkbox is checked
  • Is hiding content by Javascript or jQuery Worth trying
  • Load XUL resource using javascript
  • XML to HTML text area from server file system
  • set focus() on textbox on form onload
  • es lint '' is assigned a value but never used' eventhough i have used it
  • Can "name" attribute be used for custom VueJS components
  • Get innerHTML of content when it is clicked
  • HTTPS causes CSS animations to not load? Very confused
  • How to hide other div apart from touched div to the band
  • Is global variable assignment atomic on NodeJS?
  • Datepicker onchangemonthyear beforeshowday
  • trying to render html files using jade but it still adresses it as a jade
  • Google Analytics - Understanding and Dissecting the Snippet: What is | | [ ];
  • Replacing "[aA09.b]." to "[aA09.b]\n" in in JavaScript
  • Why wrap a function definition in an immediate function?
  • Enable / disable jQuery script on switching to different tab in a HTML page
  • how can find return variable value outside anonymous function in node js mysql query function
  • Converting 1 to 0001 in javascript array
  • svg viewbox should not resize the text fontSize?
  • store newline character with string in a variable
  • MP4 videos in Flowplayer does not play in Windows 7 Chrome
  • jquery focusin event not firing
  • How to debug Vue application with google chrome
  • html 5 web app cache download complete javascript alert?
  • Ember.js setupController fired only once
  • How to validate a currency input
  • How to convert my Array of data to key & value pair
  • Statistics circles in CSS
  • So I wanted to make a trig solver in javascript?
  • Showing HighCharts series name on x-axis and in legend
  • In Rails, how can we pass parameters in script?
  • Build Fails: `npm rebuild node-sass --force`
  • Angular Datepicker change dateformat
  • Trying to extract data from between two sets of characters
  • Configuring Jest in WebStorm
  • Uncaught Error: Syntax error, unrecognized expression: tr.ec_portfolio_title,
  • JQuery fading in fading out continuously
  • Unexpected end of input (Line 1) and Undefined Function?
  • shadow
    Privacy Policy - Terms - Contact Us © ourworld-yourmove.org