Sniberb•13mo ago

snowberb – 15-27 Jul 6

can someone explain to me what this code does in like a really dumb way so everyone could understand it?

const parts = path
    .slice(1)
    .split("/")
    .filter((i) => Boolean(i));
  let res = obj;

  for (let i = 0; i < parts.length; i++) {
    let part = parts[i];
    res = res[part];
  }
return res

const parts = path
    .slice(1)
    .split("/")
    .filter((i) => Boolean(i));
  let res = obj;

  for (let i = 0; i < parts.length; i++) {
    let part = parts[i];
    res = res[part];
  }
return res

4 Replies

lebouwski•13mo ago

const parts = path
    .slice(1)
    .split("/")
    .filter((i) => Boolean(i));

const parts = path
    .slice(1)
    .split("/")
    .filter((i) => Boolean(i));

this takes a path like "/foo/bar/baz" and turns it into ['foo', 'bar', 'baz']

let res = obj;

let res = obj;

this is presumably a directory tree, an object like

{
  foo: {
    bar: {
      baz: 42
    }
  }
}

{
  foo: {
    bar: {
      baz: 42
    }
  }
}

and then

  for (let i = 0; i < parts.length; i++) {
    let part = parts[i];
    res = res[part];
  }

  for (let i = 0; i < parts.length; i++) {
    let part = parts[i];
    res = res[part];
  }

traverses the object, going in to each folder. so at the end you'd be left with 42

Unknown User•13mo ago

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lebouwski•13mo ago

yeah filter(boolean) handles that too

reactibot•13mo ago

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