使用正则表达式JavaScript从字符串中删除子字符串

Question

I have a string in javascript like this:

frmSearch=FeeType=RecordingSpend:LoginID=:PersonCalled=:FeeAmount=22.234567:Paid=

I want to remove :FeeAmount=22.234567 part from this string using Regex or string.replace .

It can be empty like this:

frmSearch=FeeType=RecordingSpend:LoginID=:PersonCalled=:FeeAmount=:Paid=

or it can contain any value

I tried this:

var str= frmSearch.substr(frmSearch.indexOf(":FeeAmount"), frmSearch.indexOf(":Paid="));

How can I do it using regex?

Answer 1

var frmSearch = "FeeType=RecordingSpend:LoginID=:PersonCalled=:FeeAmount=22.234567:Paid=";
frmSearch = frmSearch.replace(/(^|:)FeeAmount=[^:]*/,'$1FeeAmount=');

...will leave FeeAmount= in the string. To remove it completely:

frmSearch = frmSearch.replace(/(^|:)FeeAmount=[^:]*/,'');

Answer 2

How about this?

var input = 'frmSearch=FeeType=RecordingSpend:LoginID=:PersonCalled=:FeeAmount=22.234567:Paid=';
var output = input.replace(/:FeeAmount=[0-9.]*/, '');

Answer 3

根据问题，匹配的正则表达式规则可以是

':FeeAmount=[^:]*'