JavaScript Syntax Soup: p in o

By Xah Lee. Date: . Last updated: .

In JavaScript, you have these syntax:

The first looks the same as part of the second, but they have nothing to do with each other. [see JavaScript: Access/List Properties]

In other words, the in operator has context dependent semantics.

Soup. Soup. It's All Soup.

Context Dependent Syntax

  1. JavaScript Syntax Soup: p in o
  2. Python Syntax Soup: x in y
  3. Context Dependent Syntax, Python, Lisp setf

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