I have an array
with multiple objects
inside.
It's structured like that:
const Instructor = [
{ ID: '141',
InstructorNameAR: 'test',
InstructorNameEN: 'Mohamed Ahmed',
InstructorBriefAR: 'phd in chemistry',
InstructorBriefEN: 'phd in chemistry' },
{ ID: '140',
InstructorNameAR: 'test',
InstructorNameEN: 'Mahmoud Ahmed',
InstructorBriefAR: 'phd in chemistry',
InstructorBriefEN: 'phd in chemistry' },
]
I wanted to add other objects
but filtered of duplicates based on their ID
values.
Example of objects
i want to add :-
const InstructorInstance = {
ID: 'ID',
InstructorNameAR: 'NAMEAR',
InstructorNameEN: 'NAMEEN',
InstructorBriefAR: 'BRIEFAR',
InstructorBriefEN : 'BRIEFEN'
}
I used this method to filter by ID
.
But it didn't work as it compares only a single
value of the array
to the value i provided. which means it might be a duplicated object
but still gets added because it did not check if it exists in each array element
Instructor.forEach(instance =>{
if(instance.ID !== InstructorInstance.ID){
Instructor.push(InstructorInstance);
}else{
console.log('Duplicate')
}
})
You have to loop the whole array first before deciding whether there is a duplicate or not. You can use forEach
for that but every
or some
seem like the perfect fit for this kind of job:
const test = Instructor.every(instance => instance.ID !== InstructorInstance.ID);
if(test) {
Instructor.push(InstructorInstance);
}
Which means if every object in Instructor
has a different ID
than InstructorInstance
, then push InstructorInstance
into Instructor
.
Note: You can put the test directly inside if
without having to store it in a variable test
:
if(Instructor.every(instance => instance.ID !== InstructorInstance.ID)) {
Instructor.push(InstructorInstance);
}
But that doesn't look, does it?