I want to check two array values are same or not. I am using a form with checkboxes. need show any change in checkbox array or not?. can anyone help me. Two arrays Like this.
array1 = ['1','2','3']; //previous checklist
array2 = ['3','2','1']; //new checklist
Here is a snippet that compares two arrays.
var array1 = [1,2,3];
var array2 = [1,2,3];
var result = array1.length == array2.length && array1.every(function(element, index) {
return element === array2[index];
});
alert(result);
however 1,2,3 in one array is not equal with 3,2,1 in another. You didn't mentioned about to check the array elements or just the array !
In Case you need to compare two arrays with different positions, try this
var array1=[1,2,3,4]
var array2=[1,4,3,2]
var result = array1.length==array2.length && array1.every(function(v,i) { return ($.inArray(v,array2) != -1)})
console.log(result)
I got this:
let arr = ['1', '2', '3'];
let arr2 = ['3', '1', '2'];
let finalResult = arr.length === arr2.length;
arr.forEach(function (item) {
if (!finalResult) {
return;
}
if (arr2.find(function (item2) { return item === item2; }) === undefined) {
finalResult = false;
}
});
console.log(finalResult);
// Warn if overriding existing method
if(Array.prototype.equals)
console.warn("Overriding existing Array.prototype.equals. Possible causes: New API defines the method, there's a framework conflict or you've got double inclusions in your code.");
// attach the .equals method to Array's prototype to call it on any array
Array.prototype.equals = function (array) {
// if the other array is a falsy value, return
if (!array)
return false;
// compare lengths - can save a lot of time
if (this.length != array.length)
return false;
for (var i = 0, l=this.length; i < l; i++) {
// Checking whether the array contains this element
if(isValueExistsInArray(this[i],array) == false) {
return false;
}
}
return true;
}
function isValueExistsInArray(value,compareToArray) {
for(var j = 0, k=compareToArray.length; j<k; j++) {
if(value == compareToArray[j]) {
return true;
}
}
return false;
}
// Hide method from for-in loops
Object.defineProperty(Array.prototype, "equals", {enumerable: false});
array1 = ['1','2','3'];
array2 = ['1','2','3'];
array3 = ['3','2','1'];
array4 = ['3','5','1'];
array5 = ['3','5','1',6];
array1.equals(array2) == true
array1.equals(array3) == true
array1.equals(array4) == false
array1.equals(array5) == false
Finally I have perfect answer for compare two array in javascript.
var array1 = ["1","2","3"];
var arr1 = array1.map(function (x) {
return parseInt(x, 10);
});
var array2 = ["3","2","1"];
var arr2 = array2.map(function (x) {
return parseInt(x, 10);
});
var finalArray1 = arr1.sort();
var finalArray2 = arr2.sort();
var is_same = finalArray1.length == finalArray2.length && finalArray1.every(function(element, index) {
return element === finalArray2[index];
});
if(is_same == true){
console.log('match');
}else{
console.log('not match');
}