deno.land / std@0.166.0 / path / common.ts

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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.
import { SEP } from "./separator.ts";
/** Determines the common path from a set of paths, using an optional separator, * which defaults to the OS default separator. * * ```ts * import { common } from "https://deno.land/std@$STD_VERSION/path/mod.ts"; * const p = common([ * "./deno/std/path/mod.ts", * "./deno/std/fs/mod.ts", * ]); * console.log(p); // "./deno/std/" * ``` */export function common(paths: string[], sep = SEP): string { const [first = "", ...remaining] = paths; if (first === "" || remaining.length === 0) { return first.substring(0, first.lastIndexOf(sep) + 1); } const parts = first.split(sep);
let endOfPrefix = parts.length; for (const path of remaining) { const compare = path.split(sep); for (let i = 0; i < endOfPrefix; i++) { if (compare[i] !== parts[i]) { endOfPrefix = i; } }
if (endOfPrefix === 0) { return ""; } } const prefix = parts.slice(0, endOfPrefix).join(sep); return prefix.endsWith(sep) ? prefix : `${prefix}${sep}`;}
std
Deno standard library
GitHub Repositorydenoland/deno_std
GitHub Stars
2458

Version Info

Tagged at
2 months ago