« »

The JavaScript prototype functions in this JavaScript article tutorial are collected by jsB@nk from many JavaScript resources on the Internet. These JavaScript prototype functions are very helpful and essential to your JavaScript applications, web-based applications if you need to reduce time and work to process JavaScript tasks. And if you are still not good at JavaScript prototype functions, please read the JavaScript article below:
- JavaScript Prototype: Some Basic Concepts
- Prototype Dollar Function

This JavaScript article tutorial provides you the JavaScript source codes of 13 JavaScript prototype functions to process JavaScript Strings, JavaScript Arrays and Number variables, please go to the full-post page for details, now jsB@nk shows you some very popular JavaScript prototype functions only:
- contains: check if a string contains a child string
- trim: strips all redundant spaces from beginning and end of string
- copy: copy/clone an array variable
- random: return a random element, optionally up to or from range

Label: JavaScript Prototype Functions, JavaScript Applications, JavaScript object prototype, prototype in JavaScript, JavaScript prototype function, JavaScript prototype library, JavaScript prototype class, JavaScript string prototype, prototype JavaScript AJAX

Report to us error of this JavaScript

Demo
Enlarge
Reload
New window

Free iPage Web Hosting for First Year NOW

If you're still looking for a reliable web host provider with affordable rates, why you don't take a little of time to try iPage, only with $1.89/month, included $500+ Free Extra Credits for the payment of 24 months ($45)?

Over 1,000,000+ existisng customers can not be wrong, definitely you're not, too! More important, when you register the web hosting at iPage through our link, we're going to be happy for resending a full refund to you. That's awesome! You should try iPage web hosting for FREE now! And contact us for anything you need to know about iPage. Try iPage for FREE First Year NOW

Code
JavaScript
Print

Copy All x2

<script type="text/javascript">
// -- Standard functions
// String.contains() - See if a string contains a string
String.prototype.contains = function(str) {
    return (this.indexOf(str) != -1);
};

// String.getChar() - Gets the character at a specific position
String.prototype.getChar = function(char_pos) {
    return this.substring(char_pos, char_pos + 1);
}

// String.trim() - Strips spaces from beginning and end of string
String.prototype.trim = function() {
    return this.replace(/^\s+|\s+$/g, '');
};

// Array.contains() - See if an array contains an object
if (typeof Array.prototype.contains === 'undefined') {
    Array.prototype.contains = function(obj) {
        var i = this.length;
        while (i--) {
            if (this[i] === obj) {
                return true;
            }
        }
        return false;
    };
}

// Array.copy() - Copy an array
if (typeof Array.prototype.copy === 'undefined') {
    Array.prototype.copy = function() {
        var a = [],
            i = this.length;
        while (i--) {
            a[i] = typeof this[i].copy !== 'undefined' ? this[i].copy() : this[i];
        }
        return a;
    };
}

// Array.forEach( function ) - Apply a function to each element
Array.prototype.forEach = function(f) {
    var i = this.length,
        j, l = this.length;
    for (i = 0; i < l; i++) {
        if ((j = this[i])) {
            f(j);
        }
    }
};

// Array.indexOf( value, begin, strict ) - Return index of the first element that matches value
Array.prototype.indexOf = function(v, b, s) {
    for (var i = +b || 0, l = this.length; i < l; i++) {
        if (this[i] === v || s && this[i] == v) {
            return i;
        }
    }
    return -1;
};

// Array.insert( index, value ) - Insert value at index, without overwriting existing keys
Array.prototype.insert = function(i, v) {
    if (i >= 0) {
        var a = this.slice(),
            b = a.splice(i);
        a[i] = v;
        return a.concat(b);
    }
};

// Array.lastIndexOf( value, begin, strict ) - Return index of the last element that matches value
Array.prototype.lastIndexOf = function(v, b, s) {
    b = +b || 0;
    var i = this.length;
    while (i-- > b) {
        if (this[i] === v || s && this[i] == v) {
            return i;
        }
    }
    return -1;
};

// Array.random( range ) - Return a random element, optionally up to or from range
Array.prototype.random = function(r) {
    var i = 0,
        l = this.length;
    if (!r) {
        r = this.length;
    }
    else if (r > 0) {
        r = r % l;
    }
    else {
        i = r;
        r = l + r % l;
    }
    return this[Math.floor(r * Math.random() - i)];
};

// Array.shuffle( deep ) - Randomly interchange elements
Array.prototype.shuffle = function(b) {
    var i = this.length,
        j, t;
    while (i) {
        j = Math.floor((i--) * Math.random());
        t = b && typeof this[i].shuffle !== 'undefined' ? this[i].shuffle() : this[i];
        this[i] = this[j];
        this[j] = t;
    }
    return this;
};

// Array.unique( strict ) - Remove duplicate values
Array.prototype.unique = function(b) {
    var a = [],
        i, l = this.length;
    for (i = 0; i < l; i++) {
        if (a.indexOf(this[i], 0, b) < 0) {
            a.push(this[i]);
        }
    }
    return a;
};

// Array.walk() - Change each value according to a callback function
Array.prototype.walk = function(f) {
    var a = [],
        i = this.length;
    while (i--) {
        a.push(f(this[i]));
    }
    return a.reverse();
};
</script>

Comment (0)
Write

by Preview

Cancel reply

Write your comment

Comments of Guest will be previwed before published
Give your real email to get notifying replies, or comment will be deleted

Your name *
Your email^g *
~~Your site~~

Comment's title

I assure 100% I am real human
I repeat I am not bot

Sent (0)
New

BBCode
HTML
URL
JID

iPhoneKer.com
Save up to 630$ when buy new iPhone 15

GateIO.gomymobi.com
Free Airdrops to Claim, Share Up to $150,000 per Project

https://tooly.win
Open tool hub for free to use by any one for every one with hundreds of tools

chatGPTaz.com, chatGPT4.win, chatGPT2.fun, re-chatGPT.com
Talk to ChatGPT by your mother language

Dall-E-OpenAI.com
Generate creative images automatically with AI

AIVideo-App.com
Render creative video automatically with AI

Cool Domains for Sale!

javascriptbank.com javascripton.com gomy.mobi gomymobi.com CreditCard.rip index.services war.money Card.rip CoinHolo.com this.bid ChainTutor.com YeuNu.com choose.works CryptoKD.com pornID.net XMQV.com ApexBTC.com ZWVQ.com eChainBank.com system.money ChatTotal.com choose.exchange CTRCoin.com ABP3.com

Submit day:
Author:
Previews:
Comment:
Votes:
Sent:
Size:
Rank:

04/07/2011
Phong Thai [more]
6,675
0
0
0
9.3 KBytes

Some Essential JavaScript Prototype Functions to Enhance your JavaScript Applications - JID: 2632 - Language: English

0/5 0 votes / 6,675 previews / 0 comment 04/07/2011 The JavaScript prototype functions in this JavaScript article tutorial are collected by jsB@nk from many ...Some Essential JavaScript Prototype Functions to Enhance your JavaScript Applications - JID: 2632 - Some Essential JavaScript Prototype Functions to Enhance your JavaScript Applications - Language: English

hiepga.com[2]

Let's be first member to do this

Awesome WebGL Experiments with Stunning JavaScript Applications

JavaScript by day

Google Safe Browsing McAfee SiteAdvisor Norton SafeWeb Dr.Web