31 lines
635 B
Plaintext
31 lines
635 B
Plaintext
// @flow strict
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export type Path = {|
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+prev: Path | void,
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+key: string | number,
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+typename: string | void,
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|};
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/**
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* Given a Path and a key, return a new Path containing the new key.
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*/
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export function addPath(
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prev: $ReadOnly<Path> | void,
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key: string | number,
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typename: string | void,
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): Path {
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return { prev, key, typename };
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}
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/**
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* Given a Path, return an Array of the path keys.
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*/
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export function pathToArray(path: ?$ReadOnly<Path>): Array<string | number> {
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const flattened = [];
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let curr = path;
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while (curr) {
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flattened.push(curr.key);
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curr = curr.prev;
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}
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return flattened.reverse();
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}
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