diff options
| author | Philipp Tanlak <philipp.tanlak@gmail.com> | 2025-11-24 20:54:57 +0100 |
|---|---|---|
| committer | Philipp Tanlak <philipp.tanlak@gmail.com> | 2025-11-24 20:57:48 +0100 |
| commit | b1e2c8fd5cb5dfa46bc440a12eafaf56cd844b1c (patch) | |
| tree | 49d360fd6cbc6a2754efe93524ac47ff0fbe0f7d /node_modules/@jridgewell/set-array/dist/set-array.mjs | |
Docs
Diffstat (limited to 'node_modules/@jridgewell/set-array/dist/set-array.mjs')
| -rw-r--r-- | node_modules/@jridgewell/set-array/dist/set-array.mjs | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/node_modules/@jridgewell/set-array/dist/set-array.mjs b/node_modules/@jridgewell/set-array/dist/set-array.mjs new file mode 100644 index 0000000..b7f1a9c --- /dev/null +++ b/node_modules/@jridgewell/set-array/dist/set-array.mjs @@ -0,0 +1,48 @@ +/** + * Gets the index associated with `key` in the backing array, if it is already present. + */ +let get; +/** + * Puts `key` into the backing array, if it is not already present. Returns + * the index of the `key` in the backing array. + */ +let put; +/** + * Pops the last added item out of the SetArray. + */ +let pop; +/** + * SetArray acts like a `Set` (allowing only one occurrence of a string `key`), but provides the + * index of the `key` in the backing array. + * + * This is designed to allow synchronizing a second array with the contents of the backing array, + * like how in a sourcemap `sourcesContent[i]` is the source content associated with `source[i]`, + * and there are never duplicates. + */ +class SetArray { + constructor() { + this._indexes = { __proto__: null }; + this.array = []; + } +} +(() => { + get = (strarr, key) => strarr._indexes[key]; + put = (strarr, key) => { + // The key may or may not be present. If it is present, it's a number. + const index = get(strarr, key); + if (index !== undefined) + return index; + const { array, _indexes: indexes } = strarr; + return (indexes[key] = array.push(key) - 1); + }; + pop = (strarr) => { + const { array, _indexes: indexes } = strarr; + if (array.length === 0) + return; + const last = array.pop(); + indexes[last] = undefined; + }; +})(); + +export { SetArray, get, pop, put }; +//# sourceMappingURL=set-array.mjs.map |