如何编写一个 JS 函数从字符串中删除某些符号的数组

Question

Need to write a function, that takes two arguments:

1. the first is a string
2. the second is an array of symbols we need to exclude from the string.

As a result it should turn out as `foo('hello world', ['o']); // 'hell wrld'

Here is the example for the case if we have only one symbol to remove:

function foo(string, array) {
  var newString = '';
  for (var i = 0; i < string.length; i++) {
    newString += string[i].replace(array, '');                      
  }
  return newString; 
}

//lad up n guns bring yur friends
console.log(foo('load up on guns bring your friends',['o'])); 

Answer 1

You could build a regular expression and remove the unwanted characters.

 function foo(string, array) { return string.replace(new RegExp(array.join('|'), 'gi'), ''); } console.log(foo('load up. on guns bring your friends.', ['o', 'i', '\\\\.']));

An approach without a regular expression.

 function replace(string, array) { var search = new Set(array); return Array.from(string, c => search.has(c) ? '' : c).join(''); } console.log(replace('load up on guns bring your friends', ['o', 'i']));

Answer 2

You can use for loop to loop through all replacable elements & remove matching characters using regexmatch on string

 function foo(string, array) { for(const a of array){ let pattern = new RegExp(a, 'g'); string = string.replace(pattern, ''); } return string; } console.log(foo('load up on guns bring your friends',['o','i'])); //lad up n guns bring yur friends

Answer 3

you can do this by simply using regex like given below

 function foo(str,arr) { var regExp = new RegExp('['+arr.join(',')+']+','g'); console.log(str.replace(regExp, "")); } foo("hello world",['o'])