Is it possible to replace the a character at a particular position with a string
Let us say there is say a string : "I am a man"
I want to replace character at 7 with the string "wom" (regardless of what the original character was).
The final result should be : "I am a woman"
Strings are immutable in Javascript - you can't modify them "in place".
You'll need to cut the original string up, and return a new string made out of all of the pieces:
// replace the 'n'th character of 's' with 't'
function replaceAt(s, n, t) {
return s.substring(0, n) + t + s.substring(n + 1);
}
NB: I didn't add this to String.prototype because on some browsers performance is very bad if you add functions to the prototype of built-in types.
.replace doesn't support position based indices, unless you construct a needlessly complicated regexp..replace() replaces by content. i.e. he wants to replace at the 7th position regardless of what character is already there.str.replace("man", "woman");Or you could do it this way, using array functions.
var a='I am a man'.split('');
a.splice.apply(a,[7,1].concat('wom'.split('')));
console.log(a.join(''));//<-- I am a woman
There is a string.replace() method in Javascript:
https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/String/replace
P.S.
By the way, in your first example, the index of the "m" you are talking about is 7. Javascript uses 0-based indices.
