Check out example codes for ".find angular how does it work". It will help you in understanding the concepts better.

Code Example 1

this.attr_0 = this.attr_1.find(x => x.id === someId);

// .find() works like a foreach loop here,
// it'll look inside of the this.attr_1 (array)
// and return on the condition (x.id === someId)

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