:
arr1:
var arr1 =[1,2,3,4,5] var arr1 =[1,4]; //1,2,3...ID
arr2:
var arr2=[{id:1,name:11},{id:2,name:222},{id:3,name:333},{id:4,name:444}];
:
arr1:[1,2],arr2[{id:1,name:11},{id:2,name:222}];
arr1:[1,3],arr2[{id:1,name:11},{id:3,name:333}];
:
arr1:
var arr1 =[1,2,3,4,5] var arr1 =[1,4]; //1,2,3...ID
arr2:
var arr2=[{id:1,name:11},{id:2,name:222},{id:3,name:333},{id:4,name:444}];
:
arr1:[1,2],arr2[{id:1,name:11},{id:2,name:222}];
arr1:[1,3],arr2[{id:1,name:11},{id:3,name:333}];
var arr2 = arr1.map((item,index)=>{
return {
id:item,
name:+new Array(3).fill(item).join('')
}
})did not understand the question at first
var arr3 = Object.create(null)
arr2.forEach(item=>{
arr3[ item.id ] = item
})
var arr4 = arr.map(item=>{
return arr3[ item ]
})
arr1.forEach(el => {
console.log( arr2.filter(item => item.id == el)
})
the desired result is directly assigned. I printed it out for you here
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