sprintf() and printf() in JavaScript

//Try this code by clicking the button below var input = "'30' -> decimal: %d / bin = %b / oct = %o / hex = %x / HEX = %X"; var output = sprintf(input, 30, 30, 30, 30, 30); var msg = "NUMBERS TEST (1/2)\n"; msg += "---------------------------\n" msg += "Input...... " + input + "\n"; msg += "Output.... " + output alert(msg);

Please note that is not finished yet! There are a lot of things to be done, including but not limited to:

• Write documentation (Read: shamelessly copy PHP's sprintf() documentation)
• Support substitution padding and justification
• Support argument swapping
• Make the page validate (invalid > characters, etc.)
• Find an accepted specification for sprintf() and make this implementation compatible