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December 15, 2017 13:11
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Haystack needle recursive
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| findKey = (haystack, needle) => { | |
| let found = false | |
| const iterate = (obj) => ( | |
| Object.keys(obj).forEach((key) => { | |
| if (found === false) { | |
| if (key === needle) { | |
| found = key | |
| } else if (obj[key] && typeof obj[key] === 'object') { | |
| iterate(obj[key]) | |
| } | |
| } | |
| }) | |
| ) | |
| if (haystack && typeof haystack === 'object') { | |
| iterate(haystack) | |
| } | |
| return found | |
| } | |
| } |
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