for example, an array of objects:
let people = [{id: 1, name: "Bob"}, {id: 2, name: "Alice"}, {id: 3, name: "Lilei"}] how can I easily get the {id: 1, name: "Bob"} object through a known id=1 ?
except for methods that traverse directly.
for example, an array of objects:
let people = [{id: 1, name: "Bob"}, {id: 2, name: "Alice"}, {id: 3, name: "Lilei"}] how can I easily get the {id: 1, name: "Bob"} object through a known id=1 ?
except for methods that traverse directly.
use es6's find:
let r = people.find(v => v.id === 1) function searchById(id) {
let people = [{id: 1, name: 'Bob'}, {id: 2, name: 'Alice'}, {id: 3, name: 'Lilei'}]
return new Map(people.map(item=>[item.id, item])).get(id)
}
searchById(1)if the word string is not traversed, use regular
can be obtained directly through the subscript
let people = [{id: 1, name: 'Bob'}, {id: 2, name: 'Alice'}, {id: 3, name: 'Lilei'}];
let id = 1;
let obj = people[id - 1];
console.log(obj)Uh. Misunderstand the meaning of the topic, please ignore it.
array.filter: http://www.runoob.com/jsref/j...
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