Need Something like C# Expression Tree on Javascript

Question

Consider something like this.

const myFunc = (x) => x.Property1;
let obj = {
 Property1: "value1",
 Property2: "value2"
};

console.log(myFunc(obj)); // output: value1

I need something like this:

console.log(whatINeed(myFunc, obj)) // output: **Property1**

Is it possible to achieve this requirements ?!

what will be the body of "whatINeed" function ?

have a look here http://stackoverflow.com/questions/2478038/what-is-the-leading-linq-for-javascript-library — Anestis Kivranoglou, Nov 08 '16 at 09:04
@Rajesh I want to know which propery of my obj is tried to read. I want to get "Property1" in my sample. — Ehsan, Nov 08 '16 at 09:09
Guess you have to write some kind of "parser" for that. That shouldn't be too hard. — vothaison, Nov 08 '16 at 09:15
@AnestisKivranoglou thanks for your comment. I think, you misunderstood. Lamda syntax isn't my issue. I need to find out which property of my Model (obj) is tried to read. 'Property1' in this sample. — Ehsan, Nov 08 '16 at 09:15

score 4 · Accepted Answer · answered Nov 08 '16 at 09:19

4

If you run myFunc.toString(), it will give you "(x) => x.Property1". You can then write a parser for that, shouldn't be too hard. It will be hard if you want full-feature like C#.

answered Nov 08 '16 at 09:19

vothaison

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It's a kind of solution. Waiting for any other solution... thanks. – Ehsan Nov 08 '16 at 09:40

Need Something like C# Expression Tree on Javascript

1 Answers1