在不使用 split() 或任何内置方法且不超过 1 个参数的情况下，在 Javascript 中将字符串转换为数组？

Question

Convert a String to an Array in Javascript without using split() or any built-in methods?

input:

str = "Iam a fullstack javascript developer"

output:

arr = [ 'Iam', 'a', 'fullstack', 'javascript', 'developer' ]

confirmation:

console.log(arr[0]) // Iam

Answer 1

 var str="Iam a fullstack javascript developer"; var strCharArr; [...strCharArr]=str; var arr=strCharArr.reduce((acc, cv)=>{if(cv==" ") acc.push(""); else acc[acc.length-1]+=cv; return acc;},[""]); console.log(arr);

[...strCharArr]=str splits the string into an array of characters.
reduce starts with an array of one element of empty string ( [""] ),
and either adds characters, or, in case of a space, adds an empty string element.

Answer 2

Here is the solution

function stringToArray(str) {
    let arr = [''];
    let j = 0;

    for (let i = 0; i < str.length; i++) {
        if (str.charAt(i) == " ") {
            j++;
            arr.push('');
        } else {
            arr[j] += str.charAt(i);
        }
    }
    return arr;
}

const arr = stringToArray("Iam a fullstack javascript developer")
console.log(arr[0]) // Iam

Answer 3

Recursive approach with using indexOf and slice

 str = "Iam a fullstack javascript developer"; const split = (str, arr) => { const index = str.indexOf(" "); if (index > -1) { arr.push(str.slice(0, index)); split(str.slice(index + 1), arr); } else { arr.push(str); } return ""; }; const chunks = (str) => { const arr = []; split(str, arr); return arr; }; console.log(chunks(str));