I have two strings:
const originalSegments = '[ABC][XYZ][123][789]';
const format = 'X-XX-X';
I need to create a new string where the dashes are inserted between sets of characters in originalSegments based on the placement of separators in format.
Each set of a characters between brackets is equal to one format character,
i.e. [*] === X
The desired end result is:
'[ABC]-[XYZ][123]-[789]'
I can get the length of each section in format:
const formatSections = format.split('-');
const formatSectionLengths = formatSections.map(section => section.length);
// => [1, 2, 1]
And the number of segments in originalSegments:
const originalSegmentsCount = (regexToString.match(/\]\[/g) || []).length + 1;
// => 4
But I'm not sure what to do next.
Would Array.prototype.reduce() work for this? Any advice is greatly appreciated!
Here is another approach:
const text='[ABC][XYZ][123][789]',
pat='X-XX-X';
let txt=text.replaceAll("][","],[").split(",");
console.log(pat.split("").reduce((a,c)=>
a + (c==="X"?txt.pop():c)
, ""))I'd propose this solution for your case
const originalSegments = "[ABC][XYZ][123][789]";
//convert all segments to ["ABC","XYZ","123","789"]
const segments = originalSegments.split('[').filter(x => x).map(x => x.split(']')[0]);
const format = 'X-XX-X'
let result = []
let segmentIndex = 0
//loop through format to find X for the replacement
for(let i = 0; i < format.length; i++) {
const character = format[i]
//if the current character is X, replace with segment data
if(character === "X") {
result.push(`[${segments[segmentIndex]}]`)
//check the next segment
segmentIndex++
continue
}
result.push(character)
}
//convert all results to a string
const finalResult = result.join("")
console.log(finalResult)Interesting question. Another version using regex group matches and map
const originalSegments = '[ABC][XYZ][123][789]';
const format = 'X-XX-X';
const segs = originalSegments.match(/(\[[\w]+\])/g);
const output = [...format]
.map((ch) => (ch === "X" ? segs.shift() : ch))
.join("");
console.log(output)