i like to ask for advise how to let this array [1,2,3,4, 5, 6, 7] to become 123, 234, 345, 456, 567?
this initial is a number 1234567, i split them
const num = 1234567;
const result = String(num)
.split("")
.map((n, i, src) => (src.length !== i + 1 ? `${n}${src[i + 1]}` : null))
.filter(Boolean)
.map(Number);
console.log(result)the result got 12, 23, 34, 45 etc.
how to make it become 123, 234, 345, 456?
thank you for help
The simplest solution will be to loop over the array and loop until length - 2 as:
const num = 1234567;
const strNum = String(num);
const result = [];
for (let i = 0; i < strNum.length - 2; ++i) {
result.push(strNum.slice(i, i + 3));
}
console.log(result);You can even create a generic function and get the result string of desired length
const num = 1234567;
const strNum = String(num);
function getPartialString(str, len) {
const result = [];
for (let i = 0; i < strNum.length - (len - 1); ++i) {
result.push(strNum.slice(i, i + len));
}
return result;
}
console.log(getPartialString(strNum, 3));
console.log(getPartialString(strNum, 4));
console.log(getPartialString(strNum, 5));/* This is not a part of answer. It is just to give the output full height. So IGNORE IT */
.as-console-wrapper { max-height: 100% !important; top: 0; }