If I have the following variable in javascript
var myString = "Test3";
what is the fastest way to parse out the "3" from this string that works in all browsers (back to IE6)
7 Answers
Since in Javascript a string is a char array, you can access the last character by the length of the string.
var lastChar = myString[myString.length -1];
9 Comments
ryanve
Nice—and this is slightly faster. See jsperf.com/get-last-character-from-string
Avatar
IE6 - 23 Feb 2017 - seriously?
ChrisM
It's not going to work in Mosaic either, just an FYI ;) To be fair, the question does specify they are looking for IE6 compatibility, so a note to avoid any confusion for any JavaScript archaeologists out there is perhaps apt.
Jamie Dixon
@KhaledRamadan It seems like the answer in the linked question is fine. Is there something I can help you with?
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It does it:
myString.substr(-1);
This returns a substring of myString starting at one character from the end: the last character.
This also works:
myString.charAt(myString.length-1);
And this too:
myString.slice(-1);
5 Comments
leora
substr doesn't seem to be supported in Internet Explorer
leora
do you agree that this doesn't work in IE6 7?
ryanve
@leora IE can't handle negative values in
substr according to developer.mozilla.org/en/JavaScript/Reference/Global_Objects/…
Ajeet Shah
Better
slice. As String.prototype.substr(…) is not strictly deprecated (as in "removed from the Web standards"), it is considered a legacy function and should be avoided when possible. It is not part of the core JavaScript language and may be removed in the future. If at all possible, use the substring() method instead. - From MDN
s3c
Here's a speed comparison of different methods. Usually either
.substr( -1 ) or .splice( -1 ) wins, but even the usually slowest .split( ' ' ).pop( ) won one time for me. var myString = "Test3";
alert(myString[myString.length-1])
here is a simple fiddle
1 Comment
Roland Kwee
This is the only answer that utilizes the fact that a string is an array of characters
Javascript strings have a length property that will tell you the length of the string.
Then all you have to do is use the substr() function to get the last character:
var myString = "Test3";
var lastChar = myString.substr(myString.length - 1);
edit: yes, or use the array notation as the other posts before me have done.
Comments
myString.substring(str.length,str.length-1)
You should be able to do something like the above - which will get the last character
3 Comments
hmd
I had to get last
10 characters and it worked for me myString.substring(str.length,str.length-10). Thanks buddy!
Dan Salo
@hmd I think you mean:
myString.substring(str.length-10,str.length)hmd
@DanSalo
myString.substring(myString.length,myString.length-10) or myString.substring(myString.length-10, myString.length) both returns the same results. Last 10 characters.Use the charAt method. This function accepts one argument: The index of the character.
var lastCHar = myString.charAt(myString.length-1);
Comments
You should look at charAt function and take length of the string.
var b = 'I am a JavaScript hacker.';
console.log(b.charAt(b.length-1));
.substr( -1 )or.splice( -1 )wins, but even the usually slowest.split( ' ' ).pop( )won one time for me.