我可以将比较作为 function 参数传递吗？

Question

My main question is, what type of data function parameters is accepting? I would pass a comparison as parameters as for exemple

    Function test(a) //where A is a comparison so for example
test("a" == "a")

I'm trying to get the comparison expression and not the result.

Is it something possible? Any way to do it? Thanks

Answer 1

Yes, you can pass functions as parameters, and it's quite a common pattern in both JS and other languages to pass "predicate" functions.

 let isGreaterThan5 = v => v > 5; let out = [1,3,5,7,9].filter(isGreaterThan5); console.log(out);

Answer 2

Yes it is possible:

 function isPosible(param) { // Here you define a function return param; } // Below you are executing the function and printing the result console.log(isPosible("a === a")); // Returns the whole expression

More important is to understand that you can pass any expression as argument to a function, including but not limited to: Any primitive type (string, number, boolean, undefined, null, etc..), functions (callbacks), expressions that evaluates something like your case .