[英]Increment String number javascript
很抱歉这个菜鸟问题,但是我对javascript真的不满意。 我有String列表,其末尾有数字:
我想增加字符串末尾的数字。
到目前为止我尝试过的是:
var test = 'Test-001';
var lastNum = test.split('-');
console.log( lastNum[1] + 1 ); // result: 0011
console.log( Number( lastNum[1] ) + 1 ) // result: 2
我要做的是产生结果(Test-001到Test-999)。
先感谢您
您接近了....但是请尝试以下操作:
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);
尝试做这样的事情:
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);
这将为您提供帮助。
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