replace1 is a nice way to use regexps to replace text:
console.log("papa".replace("p", "m"));
console.log("Borobudur".replace(/[ou]/, "a"));
console.log("Borobudur".replace(/[ou]/g, "a"));You can also use awk like syntax to switch things around:
console.log(
"Liskov, Barbara\nMcCarthy, John\nWadler, Philip"
.replace(/(\w+), (\w+)/g, "$2 $1"));You can even pass a function to replace:
let s = "the cia and fbi";
console.log(s.replace(/\b(fbi|cia)\b/g,
str => str.toUpperCase()));let stock = "1 lemon, 2 cabbages, and 101 eggs";
function minusOne(match, amount, unit) {
amount = Number(amount) - 1;
if (amount == 1) { // only one left, remove the 's'
unit = unit.slice(0, unit.length - 1);
} else if (amount == 0) {
amount = "no";
}
return amount + " " + unit;
}
console.log(stock.replace(/(\d+) (\w+)/g, minusOne));