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ViewsHow to save the name of object in array object?
I have an array containing 7 objects named is NewClass.
When I make some changes to the objects, the object has lost its original NewClass name.
Like that:
In arrray[6] lost NewClass name.
So is there any way I can keep the NewClass name for that object?
Here is my function to handle this array:
useEffect(() => {
console.log(layers);
if (selectedLayerIndex && layers.length > 0) {
console.log(
'x',
layers.map((x) => {
if (x.feature.properties.editLayerId === selectedLayerIndex) {
console.log(x);
return (x = {
...x,
options: { ...x.options, color: 'cyan', fillColor: 'cyan' },
});
}
return x;
})
);
}
}, [selectedLayerIndex]);
Thank you so much!
·
Juan Pablo Isaza
1 answers
Answer question0
by using the syntax x = {...x, option: {/* some changes to the class */} here, you change the class to a object, which cause a lost of your class name.
If you want to keep it as a class, please use instance.attribute instead, see the following example
class Demo {
constructor(color){
this.color = color;
}
}
var array = [new Demo('red'),new Demo('red'),new Demo('red'),new Demo('red'),new Demo('red'),new Demo('red'),new Demo('red')];
console.log('original array', array);
console.log('');
array[6] = {...array[6], color: 'blue'};
console.log(array); // array[6] have been change to a object
console.log('');
array[5].color = 'green';
console.log(array); // array[5] is still a class
console.log('');
·
Juan Pablo Isaza
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