Created
March 3, 2020 11:57
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| export function defaultsDeep(object: object | Array<any>, ...sources: any[]) { | |
| return sources.reduce((acc, source) => customDefaultsDeep(acc, source), object); | |
| } | |
| function customDefaultsDeep(object, source) { | |
| if (Array.isArray(source)) { | |
| if (object === undefined) { | |
| object = [] | |
| } | |
| if (source.length < object.length) { | |
| return object.map((item, key) => merge(source, object, key, customDefaultsDeep)) | |
| } else { | |
| return source.map((item, key) => merge(object, source, key, customDefaultsDeep)) | |
| } | |
| } else { | |
| if (object === undefined) { | |
| object = {} | |
| } | |
| return Object.keys(source).reduce((acc, key) => { | |
| acc[key] = merge(object, source, key, customDefaultsDeep); | |
| return acc | |
| }, object) | |
| } | |
| } | |
| function merge(object, source, key, rec) { | |
| return isPrimitive(source[key]) | |
| ? object[key] === undefined | |
| ? source[key] | |
| : object[key] | |
| : rec(object[key], source[key]) | |
| } | |
| function isPrimitive(test) { | |
| return test !== Object(test) | |
| } |
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