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javascript compare two arrays of objects get same elements
<![CDATA[var result = result1.filter(function (o1) {
return result2.some(function (o2) {
return o1.id === o2.id; // return the ones with equal id
});
});
// if you want to be more clever...
let result = result1.filter(o1 => result2.some(o2 => o1.id === o2.id));]]>
javascript compare arrays
<![CDATA[Array.prototype.equals = function(arr2) {
return (
this.length === arr2.length &&
this.every((value, index) => value === arr2[index])
);
};
[1, 2, 3].equals([1, 2, 3]); // true
[1, 2, 3].equals([3, 6, 4, 2]); // false]]>
javascript Compare two arrays regardless of order
<![CDATA[const isEqual = (a, b) => JSON.stringify(a) === JSON.stringify(b);
// Examples
isEqual([1, 2, 3], [1, 2, 3]); // true
isEqual([1, 2, 3], [1, '2', 3]); // false]]>
how to compare two arrays javascript
<![CDATA[function arraysAreIdentical(arr1, arr2){
if (arr1.length !== arr2.length) return false;
for (var i = 0, len = arr1.length; i < len; i++){
if (arr1[i] !== arr2[i]){
return false;
}
}
return true;
}]]>
compare two array in javascript
<![CDATA[let arr1 = [1, 4, 7, 4, 2, 3];
let arr2 = [1, 2, 3, 4, 7, 18];
const is_same = arr1.length == arr2.length &&
(arr1.every((currElem)=>{
if(arr2.indexOf(currElem)> -1){
return (currElem == arr2[arr2.indexOf(currElem)]);
}return false
})
)
console.log(is_same)]]>
comparing two arrays in javascript
<![CDATA[const arr1 = [1, 2, 3];
const arr2 = [1, 3, 3];
if (arr1.length !== arr2.length) return console.log("false");
for (let i = 0; i < arr1.length; i++) {
for (let j = 0; j < arr2.length; j++) {
if (arr1[i] === arr2[j]) {
console.log("yes match", arr1[i], arr2[j]);
continue;
}
console.log("no match", arr1[i], arr2[j]);
}
}]]>
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