mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-10-04 01:18:49 +08:00
Chris Tate
94fd361b54
Represent ordinary JavaScript arrays with hole, value, and explicit-undefined states; add sparse side storage and carry missing values through the frontend, native backends, runtime, and Node-facing consumers.
12 lines
746 B
TypeScript
12 lines
746 B
TypeScript
// Mutating and copying array methods materialize optional undefined values as present slots.
|
|
const source: number[] = [4];
|
|
source.length = 3;
|
|
const pushed: number[] = [];
|
|
console.log("push-result", pushed.push(source[0], source[9]), pushed.length, pushed[0], pushed[1]);
|
|
const unshifted: number[] = [8];
|
|
console.log("unshift-result", unshifted.unshift(source[0], source[9]), unshifted.length, unshifted[0], unshifted[1], unshifted[2]);
|
|
const changed = source.with(1, source[9]);
|
|
console.log("with", source.length, source[1], changed.length, changed[0], changed[1], changed[2]);
|
|
const spliced = source.toSpliced(1, 0, source[9], source[0]);
|
|
console.log("toSpliced", spliced.length, spliced[0], spliced[1], spliced[2], spliced[3], source.length);
|