Ismael Garcia
Coping the values of and object parameter to this in a class
- At first I declare the type and default values for my class keys, but then I realize that I will need to set the values in the constructor again. So the first solution that I thought of was the fallowing:
//typescript
export default class Project {
id: string = "";
name: string = "";
date_end: string = "";
description: string = "";
parent: number | null = null;
//....MORE keys
constructor(data?: any) {
let self = this;
if (data) {
Object.getOwnPropertyNames(data).forEach(key =>{
self[key] = data[key].value
})
}
}
}
But this solution it seems to dirty and crazy so i try the fallowing :
export default class Project {
id: string = "";
name: string = "";
date_end: string = "";
description: string = "";
parent: number | null = null;
//....MORE keys
constructor(data?: any)
if (data) {
Object.assign(this, data);
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}
}
So what is Object.assing(target,source) doing ?
- Only copies enumerable and own properties from a source object to a target object.
- It uses
[[Get]]on the source and[[Set]]on the target. - It assigns properties versus just copying or defining new properties.
The other option for me would be doing, the fallowing :
export default class Project {
constructor(data?: any){
if (data) {
this.id: string = data.id;
this.name: string = data.name;
this.date_end: string = data.date_end;
this.description: string = data.description;
this.parent: number | null = data.parent;
//....MORE keys
}
}
}
Please any opinion or suggestions, about this topic or what is the best or a better implementation of assigning key -> values from obj1 to obj2, are more than welcome.
