I have kind of this Array :
array = [
{
a:0,
b:{x:1,y:2}
},
{
c:0,
b:{x:3,y:2}},
]
And I have a new object like this
{
e:0,
b:{x:2,y:5}
}
I want to test whether the objects in array have the same nested b object or not, if so I'll push the new object there, if it already exists, I'll replace the whole object with the newer one.
Any help how could I achieve that please (Lodash, ES6..),
I'm using Typescript btw.
You can simply use Array.prototype.some() method with your array to test if there's any matching b object with the searched object, your code will be:
function checkIfObjectExists(array, obj) {
return array.some(function(element) {
return (typeof obj.b === typeof element.b) && JSON.stringify(obj.b) === JSON.stringify(element.b);
});
}
This is a working snippet:
function checkIfObjectExists(array, obj) {
return array.some(function(element) {
return (typeof obj.b === typeof element.b) && JSON.stringify(obj.b) === JSON.stringify(element.b);
});
}
array = [{
a: 0,
b: {
x: 1,
y: 2
}
},
{
c: 0,
b: {
x: 3,
y: 2
}
},
];
var searched = {
e: 0,
b: {
x: 2,
y: 5
}
};
//Check an existing userId
console.log(checkIfObjectExists(array, searched));
//Check a non existing userId
console.log(checkIfObjectExists(array, {
a: 0,
b: {
x: 1,
y: 2
}
}));
obj.b=== element.b always failssearched sub-object so that it is the same sub-object of the first object in the array, and ran but it shows false ..
The following IsExists() retun true if same object already exists and return false if same object not exists.
function IsExists(YourList,Object ) {
var i;
for (i = 0; i < YourList.length; i++) {
if (YourList[i].c === Object .c && YourList[i].b === Object .b) {
return true;
}
}
return false;
}
call you function like:
var NewObject={
e:0,
b:{x:2,y:5}
}
if (!IsExists(array ,NewObject.b))
{
array .push(NewObject);
}
if the IsExists(array ,NewObject.b)return false then push this object into array
$.extendis for plain objects, not arrays