- The join() method is part of JavaScript's Array object: it returns a string representation of an array, optionally inserting characters of your choice between each element (original array not modified).
var arr = new Array("John Doe", 24, "December 17th", 57.2);
// Without argument, concatenates elements into comma-separated string:
alert( arr.join() );
In fact, since JavaScript automatically converts to string anything sent to an alert(), using this method here does no good. Without argument, join() does the same as the toString() method: var arr = new Array("John Doe", 24, "December 17th", 57.2);
alert( arr.toString() ); // Exactly the same as aboveTip: for strings, use the concat() method, or the concatenation operator (plus sign for strings).
- More usefully, show one array element per line by passing the new line escaped character "\n":
var arr = new Array("John Doe", 24, "December 17th", 57.2);
alert( arr.join("\n") ); // One element per line
Tip - manually prepend and append the separator to symmetrically surround the output string:
document.write( "#" + arr.join("#") + "#" ); - The PHP equivalent to JavaScript's join() method is the implode() function:
$arr = array('John Doe', 24, 'December 17th', 57.2);
// Print each element, preceded by an HTML line break tag:
echo implode( '<br>', $arr ); Sister / opposite method: split() takes a string to separate another one into an array of strings.
Email AOL Mail Gmail Hotmail Yahoo Mail MS Office Excel 2010 OneNote 2010 Outlook 2010 Word 2010 OS & Devices Kindle Fire Windows 7 Web Dev C# and .NET JavaScript jQuery