Here is a code snippet that I have
for(var i=0; i < this.arr2.length; i++) {
arr.push({
id: i.toString(),
label: this.arr2[i],
display: () => this.arr2[i]
})
}
I'm curious why the display is undefined when using the following approach:
let val = this.arr2[i];
display: () => val
This method seems to be functioning correctly.
In order to declare a block scope local variable, it is recommended to use the let keyword.
for(let = 0; i < this.arr2.length; i++) {
arr.push({
id: i.toString(),
label: this.arr2[i],
display: () => this.arr2[i]
})
}
For this scenario, utilizing the map method would be more efficient.
The map() method generates a new array by invoking a provided function on each element in the original array.
arr=arr2.map(function(item,i){
return {id:i,label:item,display:()=>item};
});
Here's a brief example:
arr2=[1,2,3,4,5];
arr=arr2.map(function(item,i){
return {id:i,label:item,display:()=>item};
});
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