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