How do I do global string replace without needing to escape everything?

Question

I want to replace all occurences of a pattern in a string by another string. For example, lets convert all \"$\" to \"!\":

\"$$$\" -> \"!!!\"

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Answer 1

"Plain string.replace replaces only the first match"

In that case, depending on how efficient you need the replace operation to be, you could do:

String.prototype.my_replace_all_simple = function(f, r) {
    var newstr = "";
    for (var i = 0; i < this.length; ++i) {
        if (this[i] == f) {
            newstr += r;
        } else {
            newstr += this[i];
        }
    }
    return newstr;
};

or

String.prototype.my_replace_all = function (f, r) {
    if (this.length === 0 || f.length === 0) {
        return this;
    }
    var substart = 0;
    var end = this.length;
    var newstr = "";
    while (true) {
        var subend = this.indexOf(f, substart);
        if (subend === -1) subend = end;
        newstr += this.substring(substart, subend);
        if (subend === end) {
            break;
        }
        newstr += r;
        substart = subend + f.length;
    }
    return newstr;
};
// Adapted from C++ code that uses iterators.
// Might have converted it incorrectly though.

for example.

But, I'd just use Mark's suggested way.