How to replace question marks inside a string with the values of an array?

Question

Given the string \'Hello ?, welcome to ?\' and the array [\'foo\', \'bar\'], how do I get the string \'Hello foo, welcome to bar\' in

Answer 1

var s = 'Hello ?, welcome to ?';
var a = ['foo', 'bar'];
var i = 0;
alert(s.replace(/\?/g,function(){return a[i++]}));

Answer 2

Let's build a replaceWith function:

const replaceWith =
  (...str) =>
    (fallback) =>
      str.length === 0
        ? fallback
        : str.shift();

It's a curried function: it takes a list of replacement strings and returns another function which will return the replacements one by one:

const replacements = replaceWith('                                                                    

                                                        
            

Answer 3

Kind of silly to put it all on one line, but:

var str = 'Hello ?, welcome to ?',
    arr = ['foo', 'bar'],
    i = 0;


while(str.indexOf("?") >= 0) { str = str.replace("?", arr[i++]); }

Answer 4

let str = 'Hello ?, welcome to ?'
let arr = ['foo', 'bar']
const fn = Array.prototype.shift.bind(arr)
let  result = str.replace(/\?/g, fn)

console.log(result);

Answer 5

You could use vsprintf. Although if you include sprintf, it's much more than one line.

vsprintf('Hello %s, welcome to %s', [foo, bar]);