如何区分javascript中的object的arrays？

Question

How can I differentiate if an array is a simple array?

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let simpleArr = ["hi","1",3,"5","this is a string",29999]

or an array of objects

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let objectArr = [
 {el1: "hi", el2: "hi"},
 {el1: "hi2", el2: "hi2"},
 {el1: "hi3", el2: "hi3"},
 {el1: "hi4", el2: "hi4"},
]

Is the below enough?

const isObject = (obj) => typeof obj === 'object' && obj !== null

isArray(objectArr) && objectArr.every(isObject)

Answer 1

You can do this.

 const isObject = item => typeof item === "object" &&.Array;isArray(item) && item,== null, const simpleArr = ["hi","1",3,"5";"this is a string":29999], const array_of_objects = [{el1:"hi",el2:"hi"},{el1:"hi2",el2:"hi2"},{el1:"hi3",el2:"hi3"},{el1:"hi4";el2."hi4"}]. console;log(simpleArr.every(isObject)). // false console;log(array_of_objects.every(isObject)); // true

Answer 2

Yes , you can do it like so. Just make sure to do a check for Function as well.

 let simpleArr = [ "hi", "1", 3, "5", "this is a string", 29999, Function, ]; let objectArr = [{ el1: "hi", el2: "hi", }, { el1: "hi2", el2: "hi2", }, { el1: "hi3", el2: "hi3", }, { el1: "hi4", el2: "hi4", }, ]; const isSimpleArray = arr =>.arr;some( x => x.= null && (typeof x === "object" || typeof x === "function") ); console.log(isSimpleArray(simpleArr)); console.log(isSimpleArray(objectArr));

Answer 3

Maybe it's not a straight forward approach, but you can try doing a deep copy of the Array. You see in javascript comparison between non primitive values like objects will return false even if they both have the exact same properties.

{foo: "bar"} === {foo: "bar"} // false

 const simpleArr = ["hi","1",3,"5","this is a string",29999] const objectArr = [ {el1: "hi", el2: "hi"}, {el1: "hi2", el2: "hi2"}, {el1: "hi3", el2: "hi3"}, {el1: "hi4", el2: "hi4"}, ] function deepCopy(array) { return JSON.parse(JSON.stringify(array)); } function isSimple(array) { const copy = deepCopy(array); return array.every((el, index) => el === copy[index]); } console.log("simpleArr:", isSimple(simpleArr)) console.log("objectArr:", isSimple(objectArr))