在JavaScript中验证十进制数字最干净、最有效的方法是什么?
奖励积分:
清晰解决方案应干净简单。跨平台。
测试用例:
01. IsNumeric('-1') => true
02. IsNumeric('-1.5') => true
03. IsNumeric('0') => true
04. IsNumeric('0.42') => true
05. IsNumeric('.42') => true
06. IsNumeric('99,999') => false
07. IsNumeric('0x89f') => false
08. IsNumeric('#abcdef') => false
09. IsNumeric('1.2.3') => false
10. IsNumeric('') => false
11. IsNumeric('blah') => false
function isNumeric(n) {
var isNumber = true;
$.each(n.replace(/ /g,'').toString(), function(i, v){
if(v!=',' && v!='.' && v!='-'){
if(isNaN(v)){
isNumber = false;
return false;
}
}
});
return isNumber;
}
isNumeric(-3,4567.89); // true <br>
isNumeric(3,4567.89); // true <br>
isNumeric("-3,4567.89"); // true <br>
isNumeric(3d,4567.89); // false
knockoutJs内置库验证函数
通过扩展它,该字段得到验证
1) 编号
self.number=ko.obsobservable(numberValue).exextend({number:true});
测试用例
numberValue = '0.0' --> true
numberValue = '0' --> true
numberValue = '25' --> true
numberValue = '-1' --> true
numberValue = '-3.5' --> true
numberValue = '11.112' --> true
numberValue = '0x89f' --> false
numberValue = '' --> false
numberValue = 'sfsd' --> false
numberValue = 'dg##$' --> false
2) 数字
self.number=ko.obsobservable(numberValue).exextend({digit:true});
测试用例
numberValue = '0' --> true
numberValue = '25' --> true
numberValue = '0.0' --> false
numberValue = '-1' --> false
numberValue = '-3.5' --> false
numberValue = '11.112' --> false
numberValue = '0x89f' --> false
numberValue = '' --> false
numberValue = 'sfsd' --> false
numberValue = 'dg##$' --> false
3) 最小值和最大值
self.number=可观察(numberValue).扩展({min:5}).扩展;
此字段仅接受介于5和10之间的值
测试用例
numberValue = '5' --> true
numberValue = '6' --> true
numberValue = '6.5' --> true
numberValue = '9' --> true
numberValue = '11' --> false
numberValue = '0' --> false
numberValue = '' --> false