CODEWITHSUNDEEP
javascript
Rickstar
Rickstar

Reputation: 6199

insert before last 2 char in javascript

How would I insert a % before the last 2 characters in a word?

For example:

var str = "Because";

Output:

Becau%se

Upvotes: 9

Views: 13607

Answers (8)

Tom Gullen
Tom Gullen

Reputation: 61755

Here's a function I wrote for you to do it!

var MyString = "Because";

// Inserts a string into another string at a given point
function InsertString(OriginalString, InsertingString, Position) {
    return OriginalString.substring(0, Position) + InsertingString + OriginalString.substring(Position, OriginalString.length);
}

// You can call this as well if you want it n positions from right
function InsertStringFromRight(OriginalString, InsertingString, CharsFromRight) {
    return InsertString(OriginalString, InsertingString, OriginalString.length - CharsFromRight);
}

// Call the function!
var Test1 = InsertString(MyString , "#", 5);
var Test2 = InsertStringFromRight(MyString , "#", 2);

alert(Test1);
alert(Test2);

Upvotes: 0

alex
alex

Reputation: 490453

Alternatively...

var str = "Because",
    chars = str.split('');

chars.splice(-2, 0, '%');
str = chars.join('');

jsFiddle.

Upvotes: 1

netbrain
netbrain

Reputation: 9304

Here you go! :)

http://jsfiddle.net/6WNk8/

Upvotes: 2

Aliostad
Aliostad

Reputation: 81680

Try

function insert(str, value, position){

   return str.substring(0,str.length-position) + value + str.substring(str.length-position);
}

Upvotes: 2

niksvp
niksvp

Reputation: 5563

Try this 

var str = "Because";
var result = str.slice(0, -2) +"%"+str.slice(-2);

Upvotes: 12

null
null

Reputation: 11879

Try using this:

str.substring(0,str.length-2)+"%"+str.substring(str.length-2)

Upvotes: 1

Jim Blackler
Jim Blackler

Reputation: 23169

str.substring(0, str.length - 2) + "%" + str.substring(str.length - 2)

Upvotes: 1

Ash Burlaczenko
Ash Burlaczenko

Reputation: 25465

How about

var str = "Because";
var len = str.length;
var x = str.substring(0, len-2) + "%" + str.substring(len-2);

Hope this helps.

Upvotes: 24

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