Question

I have a string like this:

A sampletext
b sampletext3
c exampletext    
A sampletext587
b sampletext5
b sampletextasdf
d sampletext4
b sometext
c sampletextrandom

How do I, in JS, convert all the text on the lines starting with b to upper case?

Thanks!

Answer 1

With regex

"b sampletext3".replace(/^b/gm,function(x){return x.toUpperCase()})
B sampletext3

And assigning it to String Object

String.prototype.toTitleCaseB=function(){
    return this.replace(/^b/gm,function(x){return x.toUpperCase()})
}

Would later use like

"b sampletext3".toTitleCaseB()
B sampletext3