How to store a string[] as string

a_splitjoincomma.md

How to store a string array as string

A little helper function:

export function escapeRegExp(str: string) {
    return str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
}

encode ...

export function joincomma(splitted: string[], char: string = ",") {
    return splitted.map(_ => _.replace(/\\/g, "\\\\").split(char).join("\\" + char)).join(char);
}

... and decode again

export function splitcomma(joined: string, char: string = ",") {
    return joined.split(new RegExp(`(?<!\\\\)${escapeRegExp(char)}`, "g")).map(_ => _.replace(/\\(?!\\)/g, "").replace(/\\\\/g, "\\"))
}

splitjoincomma.ts

export function escapeRegExp(str: string) {
    return str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
}

export function joincomma(splitted: string[], char: string = ",") {
    return splitted.map(_ => _.replace(/\\/g, "\\\\").split(char).join("\\" + char)).join(char);
}

export function splitcomma(joined: string, char: string = ",") {
    return joined.split(new RegExp(`(?<!\\\\)${escapeRegExp(char)}`, "g")).map(_ => _.replace(/\\(?!\\)/g, "").replace(/\\\\/g, "\\"))
}