Array search strategy-CodePudding

The task is the following - in input there are some English letters which I want to replace by values located in jap and put in outputArr according to dictionary in eng (same position).

But I really don't understand how to make such loop / if to make it work.

<script>
var input = "agde";
var inputArr = input.split('');
var outputArr = [];
var eng= ["a","b","c","d","e","f","g"];
var jap = ["あ","び","を","ご","で","え","よ"];

CodePudding user response：

First combine eng and jap into a lookup table (a plain object):

var eng = ["a","b","c","d","e","f","g"];
var jap = ["あ","び","を","ご","で","え","よ"];
var translation = Object.fromEntries(eng.map((letter, i) => [letter, jap[i]]));


// Now translate an example input
var input = "agde";
var output = Array.from(input, letter => translation[letter]).join("");
console.log(output);

CodePudding user response：

You can map the array and use the indexOf method from Arrays to find the index of English alphabet and use it against the jap array

var input = "agde";
var eng= ["a","b","c","d","e","f","g"];
var jap = ["あ","び","を","ご","で","え","よ"];

const getJapOut = ([...input]) => [...input].map(value => jap[eng.indexOf(value)])

console.log(getJapOut(input));

CodePudding user response：

You can make use of indexOf function to get the corresponding index, access it via [] and map the result into your outputArr:

var eng = ["a", "b", "c", "d", "e", "f", "g"];
var jap = ["あ", "び", "を", "ご", "で", "え", "よ"];

var input = "agde";
var inputArr = input.split("");

const outputArr = inputArr.map((char) => jap[eng.indexOf(char)]);
console.log(outputArr);

CodePudding user response：

Using findIndex() we can get the corresponding Japanese character and use map() to create a new array with the new characters.

var input = "agde";
var inputArr = input.split("");
var outputArr = [];
var eng = ["a", "b", "c", "d", "e", "f", "g"];
var jap = ["あ", "び", "を", "ご", "で", "え", "よ"];

let output = inputArr.map((char) => {
  const index = eng.findIndex((letter) => letter === char);
  return jap[index];
});
console.log(output);