I want to get the index of First ever character appear in the string.

for example : I have a string " 225 get first character " In this I want the index of 'g' .how to get this ?

thanks

I want to get the index of First ever character appear in the string.

for example : I have a string " 225 get first character " In this I want the index of 'g' .how to get this ?

thanks

• javascript

• 1 Have you ever taken a look at RegExpressions? – Reporter Commented Oct 21, 2013 at 8:23
• @reporter ..Can you help me out with this one ? – Rajeev Commented Oct 21, 2013 at 8:26

4 Answers 4

var str = " 225 get first character ";
var index = /[a-z]/i.exec(str).index;
alert(index); // 5

You may use a regular expression:

var str = " 225 get first character ";
var firstChar = str.match('[a-zA-Z]');
//'g'

And if you want the index,

var index = str.indexOf(firstChar);

I have simplified @Jorgeblom answer:

var str = "  255 get first character";
var firstCharIndex = str.match('[a-zA-Z]').index;

console.log(firstCharIndex);
// 6

The match() function return a array with following values:

• [0] - First matching character => "g"
• [index] - Index of the first match => 6
• [input] - the whole input string
• [groups] - empty in these case. If you declare grouped regex conditions, these groups will be listed here with the matching results

you can use
var str = " 225 get first character ";
var first_char = str.search(/[a-zA-Z]/);