Javascript string functions

[TNT]

I have two questions concerning Javascript

1: Is there a way to search for a character in a string?
2: Is there a way to "chop off" some characters from the start of a string?

[iam_clint]

yes

var string = "the cat"
string.indexOf("a");
 

will return 5 because the a is the 5th character

You can read this Article on string functionality.

and yes you can chop off characters.
heres some left and right functions you may be used to using in other languages.

function Left(str, n){
    if (n <= 0)
        return "";
    else if (n > String(str).length)
        return str;
    else
        return String(str).substring(0,n);
}
function Right(str, n){
    if (n <= 0)
       return "";
    else if (n > String(str).length)
       return str;
    else {
       var iLen = String(str).length;
       return String(str).substring(iLen, iLen - n);
    }
}
 

[TNT]

yes

var string = "the cat"
string.indexOf("a");
 

will return 5 because the a is the 5th character

You can read this Article on string functionality.

and yes you can chop off characters.
heres some left and right functions you may be used to using in other languages.

function Left(str, n){
if (n <= 0)
return "";
else if (n > String(str).length)
return str;
else
return String(str).substring(0,n);
}
function Right(str, n){
if (n <= 0)
return "";
else if (n > String(str).length)
return str;
else {
var iLen = String(str).length;
return String(str).substring(iLen, iLen - n);
}
}
 

I am new to Javascript (only reading a book on the basics four days ago)
Can you post examples instead of the "str" and "n"?

[iam_clint]

ok so you have these functions

function Left(str, n){
    if (n <= 0)
     return "";
    else if (n > String(str).length)
     return str;
    else
     return String(str).substring(0,n);
}
function Right(str, n){
if (n <= 0)
return "";
else if (n > String(str).length)
return str;
else {
var iLen = String(str).length;
return String(str).substring(iLen, iLen - n);
}
}
 

now you want the right 4 characters of a string

var thestring = "this is a simple test";
var somestring  = Right(thestring, 4);
alert(somestring);
 

somestring would = test

var thestring = "this is a simple test";
var somestring  = Left(thestring, 4);
alert(somestring);
 

somestring would = this

[markhu]

There is no leftstr() or rightstr() functions in JavaScript because the slice() function handles both.

Here is an example that shows the first 4 chars of a string, then the last 4.

x="sample string";
 
r=x.slice(0,4) + ' : ' + x + ' : ' + x.slice(-4);
 
alert( r );

r will be "samp : sample string : ring"