JS
var s = "endmemo.com R language tutorial"; var x = s.replace("R language","javascript"); //x is "endmemo.com javascript tutorial" //s is "endmemo.com R language tutorial"
Using regular expression:
var x = s.replace(/\sR.+ge\s/,"javascript"); //same result
It only replace the first occurrence by default:
var s = "endmemo.com R language tutorial"; var x = s.replace("m","M"); //x is "endMemo.com R language tutorial"
Using the "g" modifier for global replacement:
var s = "endmemo.com R language tutorial"; var x = s.replace(/m/g,"M"); //x is "endMeMo.coM R language tutorial"
Using the "i" modifier for case insensitive replacement:
var s = "endmemo.com R language tutorial"; var x = s.replace(/r/gi,"999"); //x is "endmemo.com 999 language tuto999ial"
Using $0, $1, $2 ... to replace the matches in brackets:
var s = "endmemo.com R language tutorial"; var x = s.replace(/\sR(.+ge)\s/," javascript$1 "); //endmemo.com javascript language tutorial //$0 is the whole match of the pattern var x2 = s.replace(/\sR(.+ge)\s/,"javascript$0"); //endmemo.com javascript R language tutorial
Use variables in string replace:
var str = "endmemo.com"; var pat= new RegExp("me","g"); var str2 = str.replace(pat,""); alert(str2); //endmo.com
For more javascript string functions, please click here.
For more javascript regular expression usage, please click here.