Delete X Return X Javascript
Delete X Return X Javascript. // undefined but if you try to delete such property by referecing it via this in global code (delete this.x), a familiar error pops up: // it can be deleted since it is created without var, // and is therefore configurable.
Here x is not an object it’s global variable of type number. Var output = (function() { delete x; Read our javascript tutorial to learn all you need to know about functions.
Ok, Again My Analysis Was Incorrect.
This time the interesting part is the body of the function which receives 1 as parameter. Have doubt in this question ?? // returns true // even when the property does not exist, delete returns.
Here We Encounter Another Iife.
The delete operator is used to delete the property of an object. The statement delete x will delete it which means that it will return undefined. Var output = (function() {.
Above Code Will Output 1 As Output.
The output would be 0. Read our javascript tutorial to learn all you need to know about functions. Subtracts one from its operand.
The Delete Operator Is Designed To Be Used On Object Properties.
The delete operator deletes both the value of the property and the property itself. Delete operator is used to delete property from object. // undefined but if you try to delete such property by referecing it via this in global code (delete this.x), a familiar error pops up:
Var Output = (Function() { Delete X;
Var x = { geeks : Returns the negation of its operand. // returns false (delete doesn't affect certain predefined properties) delete myobj.h;
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