I'm trying to format text of the following type
123,345,234 //tem que ficar 123345,234
abc,def,adf //tem que ficar abcdef,adf
123,345,678,abc,qualquer,coisa //tem que ficar 123345678abcqualquer,coisa
I need to remove all commas, except the last, how do I do this with regular expression in javascript?
Use the regex /,(?=[^,]*,)/g and the replace method:
var a = "123,345,234"; //tem que ficar 123345,234
var b = "abc,def,adf"; //tem que ficar abcdef,adf
var c = "123,345,678,abc,qualquer,coisa"; //tem que ficar 123345678abcqualquer,coisa
var a2 = a.replace(/,(?=[^,]*,)/g, "");
var b2 = b.replace(/,(?=[^,]*,)/g, "");
var c2 = c.replace(/,(?=[^,]*,)/g, "");
document.write(a2 + "<br/>");
document.write(b2 + "<br/>");
document.write(c2);You can do this only with javascript:
function arranjar(str){
var partes = str.split(',');
var ultima = partes.pop();
return [partes.join(''), ultima].join(',');
}
arranjar('123,345,678,abc,qualquer,coisa') // dá "123345678abcqualquer,coisa"
To do this with regex is not simpler. But an example would look like this:
function arranjarComRegex(str){
var partes = str.match(/(.*),(.*)/);
var string = partes[1].replace(/,/g, '');
return string + ',' + partes[2];
}
In this case regex (.*),(.*) captures two groups. In the first capture '123,345,678,abc,qualquer' where you need to remove the commas with .replace(/,/g, '') and the second catch group takes the last word, which then needs to be back in the string with string + ',' + partes[2] .