How to merge lines with word between them - merge

Question

If i have 10 lines . between every 2 lines there is word for example (comment)
line1
comment
line2
comment
line3
comment
line4
is there away to merge every 2 lines with the word comment to be like
line1 comment line2
line3 comment line4

Answer 1

Since you haven't mentioned which language you want to do this in, I'm just going to reason about how you want to approach this.
You want to read the first three lines: line1, comment, line2, then add this to your result. You then want to skip the next line comment,
then repeat this process until you run out of lines.
Here it is in JavaScript:
const input = `line1
comment
line2
comment
line3
comment
line4
comment
line5
comment`;
function every2Lines(text) {
const lines = text.split("\n");
const result = [];
// Read four lines
for (let i = 0; i < lines.length; i += 4) {
// Push the three first lines to the result
result.push(lines.slice(i, i + 3).join(" "));
}
return result.join("\n");
}
console.log(input);
console.log();
console.log(every2Lines(input));
Outputs:
line1 comment line2
line3 comment line4
line5 comment