Posted on • Edited on • Originally published at learn.coderslang.com
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Are there any issues with the getId function? What will be logged to the screen?
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So, getId is an arrow function, thus it doesn’t have this of its own.
It’s not bound to this of the obj object and when we try to get this.id it will be evaluated to undefined and not 1.
ANSWER: undefined will be logged to the console.
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Type is an everyday concept to programmers, but it’s surprisingly difficult to define it succinctly. I find it helpful to use Set as a conceptual model instead.
One extremely powerful typescript feature is automatic type narrowing based on control flow. This means a variable has two types associated with it at any specific point of code location: a declaration type and a narrowed type.
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Aarav Joshi -
Mike Young -
Aarav Joshi -
Mike Young -
Top comments (1)
I have not understand this can you explain