| 1 | /**
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| 2 | * Given a Path and a key, return a new Path containing the new key.
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| 3 | */
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| 4 | export function addPath(prev, key, typename) {
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| 5 | return { prev, key, typename };
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| 6 | }
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| 7 | /**
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| 8 | * Given a Path, return an Array of the path keys.
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| 9 | */
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| 10 | export function pathToArray(path) {
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| 11 | const flattened = [];
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| 12 | let curr = path;
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| 13 | while (curr) {
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| 14 | flattened.push(curr.key);
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| 15 | curr = curr.prev;
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| 16 | }
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| 17 | return flattened.reverse();
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| 18 | }
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| 19 | /**
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| 20 | * Build a string describing the path.
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| 21 | */
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| 22 | export function printPathArray(path) {
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| 23 | return path
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| 24 | .map(key => (typeof key === 'number' ? '[' + key.toString() + ']' : '.' + key))
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| 25 | .join('');
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| 26 | }
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