Sorry for this noob question but I'm really not good with javascript. I have list of String which has number at the end:
I want to increment the numbers at the end of the String.
What I tried so far:
var test = 'Test-001';
var lastNum = test.split('-');
console.log( lastNum[1] + 1 ); // result: 0011
console.log( Number( lastNum[1] ) + 1 ) // result: 2
What I want to do is to produce results ( Test-001 up to Test-999 ).
Thank you in advance
You're close .... but try this on:
var test = 'Test-001';
var pieces = test.split('-');
var prefix = pieces[0];
var lastNum = pieces[1];
// lastNum is now a string -- lets turn it into a number.
// (On older browsers, the radix 10 is essential -- otherwise it
// will try to parse the number as octal due to the leading zero.
// the radix is always safe to use and avoids any confusion.)
lastNum = parseInt(lastNum, 10);
// lastNum = +lastNum is also a valid option.
// Now, lets increment lastNum
lastNum++;
// Now, lets re-add the leading zeros
lastNum = ("0000" + lastNum).substr(-3);
parseInt() will not work because it needs to begin with a number. Your lastNum is NaN.
Test-010 right?test to "Test-010" then lastNum will correctly equal 011 at the end.("0000" + code).substr(-3) can you explain the logic of this a bit? How come its result is still right even I the input is Test-010?Try to do something like this:
var test = 'Test-001';
var lastNum = test.split('-');
var result=parseInt(lastNum[1]) + 1;
console.log(parseInt(result, 10) < 100 ? ((parseInt(result, 10) < 10 ? ("00" + result) : ("0" + result))) : result);
test = 'Test-009';
lastNum = test.split('-');
result = parseInt(lastNum[1]) + 1;
console.log(parseInt(result, 10) < 100 ? ((parseInt(result, 10) < 10 ? ("00" + result) : ("0" + result))) : result);
test = 'Test-099';
lastNum = test.split('-');
result = parseInt(lastNum[1]) + 1;
console.log(parseInt(result, 10) < 100 ? ((parseInt(result, 10) < 10 ? ("00" + result) : ("0" + result))) : result);
This will help you.
