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January 10, 2019 09:15
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Maybe function
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| const maybe = (item, fallback = null) => item ? item : new Proxy({}, { | |
| get () { | |
| return fallback; | |
| } | |
| }); | |
| // Usage: | |
| const items = [{ id: 1, value: 'a' }, { id: 2, value: 'b' }]; | |
| maybe(items.find(itm => itm.id === 1)).value; // 'a' | |
| maybe(items.find(itm => itm.id === 3)).value; // null |
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