Question 219039 in Javascript Question posted in
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Javascript – How to seperate string and numbers from an array into new arrays?

Given array:
const array = ["string1234","stringNew264"]

Result arrays should be like below arrays:

stringArray: ["string","stringNew"]
numbersArray: [1234,264]

I tried using split(), join(), foreach loop method but not getting proper result.

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3

Answers


  1. 0

    You can use reduce method and regex to select according parts.

    const array = ["string1234","stringNew264"];

const result = array.reduce((acc, cur) => {
  let stringPart = cur.replace(/[0-9]/g, '');
  let numberPart = Number(cur.replace(/[^0-9]/g, ''));
  
  acc.stringArray.push(stringPart);
  acc.numberArray.push(numberPart);
  
  return acc;
}, { stringArray: [], numberArray: [] });

console.log(result.stringArray); // ["string","stringNew"]
console.log(result.numberArray); // [1234,264]
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  2. 0

    Here is one approach. We can first split each array entry on (?<=D)(?=d), which will match the boundary between string and number. Then, use map() on the resulting array of arrays to generate the desired output.

    var array = ["string1234", "stringNew264"];
var output = array.map(x => x.split(/(?<=D)(?=d)/));
var strings = output.map(x => x[0]);
var nums = output.map(x => x[1]);
console.log(strings);
console.log(nums);
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  3. 0

    Maybe I went a little over the top here, but OP did not clearly specify in which order or how many strings and numbers can be expected in the array elements, I put together an alternative solution here that will collect all strings and all numbers from the array elements:

    var array = ["999string1234hello", "stringOnly","stringNew264abc77","123"];
const strings=[],numbers=[], rxs=/(D+)/g,rxn=/(d+)/g;
array.forEach(x=>{
 strings.push(x.match(rxs)??[]);
 numbers.push(x.match(rxn)??[]);    
});

console.log(strings);
console.log(numbers);

console.log("or, as flat arrays:")
console.log(strings.flat());
console.log(numbers.flat());
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