convert array to string in javascript

Question

I want the text to be printed without commas.

<html> <head> <title>Reverse</title> </head> <body> <form name="rev"> Enter the string : <input type="text" name="str"/> <input type="button" value="click" onclick="rev1()" /><br> reverse of given string : <input type="text" name="res"/> </form> <script type="text/JavaScript"> function rev1(){ var a=rev.str.value; var b=[]; var i,j=0; for(i=a.length-1;i>=0;i--){ b[j]=a[i]; j++ } //rev.res.value=b; alert(b); } </script> </body> </html>

If I give the input as abc I am getting an output as c,b,a, but I want it as cba.

[].toString() is implemented as [].join() (which uses a comma as a separator, by default, ie [].join(','). — Rob W
– Rob W, Commented Jul 29, 2012 at 12:07

Esailija · Accepted Answer · 2012-07-29 12:04:19Z

13

Try this:

alert( b.join("") )

You could also reverse a string more easily by:

"hello".split("").reverse().join("") //"olleh"

answered Jul 29, 2012 at 12:04

Esailija

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Comments

Michael · Accepted Answer · 2012-07-29 12:10:46Z

You may reverse your string using javascript built-in functions:

 <html> <head> <title>Reverse</title> </head> <body> <form name="rev"> Enter the string : <input type="text" name="str"/> <input type="button" value="click" onclick="rev1()" /><br> reverse of given string : <input type="text" name="res"/> </form> <script type="text/JavaScript"> function rev1(){ var a=rev.str.value; var b=a.split("").reverse().join(""); //rev.res.value=b; alert(b); } </script> </body> </html>

You may also transfer join your array elements to become a string

 <html> <head> <title>Reverse</title> </head> <body> <form name="rev"> Enter the string : <input type="text" name="str"/> <input type="button" value="click" onclick="rev1()" /><br> reverse of given string : <input type="text" name="res"/> </form> <script type="text/JavaScript"> function rev1(){ var a=rev.str.value; var b=[]; var i,j=0; for(i=a.length-1;i>=0;i--){ b[j]=a[i]; j++ } //rev.res.value=b; alert(b.join("")); } </script> </body> </html>

Tamil Selvan C · Accepted Answer · 2014-03-14 14:08:02Z

0

You can also use document.getElementById().value.reverse().join("");

edited Mar 14, 2014 at 14:08

Tamil Selvan C

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answered Jan 28, 2014 at 16:28

abdul

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