Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.javascript > #29018

ES6 itertools

Show all headers | View raw

I am working on project called ES-Iter <URL: 
https://github.com/abozhilov/ES-Iter>. Since, ES6 provides iterator 
protocol and `for-of` loop the intention of lib is to provide set of 
utility functions for lazy iteration in similar way of Python's itertools.

The lib is inspired by Python, but it is not 1 to 1 port.

Some design considerations:

- Error detection is as early as it can, e.g. `let z = Iter.zip([1, 2, 
3], null); for (let i of z) {}` it will throw an error in time of 
calling `zip` not when the iteration starts.

- Every iterator is closed properly on abrupt exits e.g. break, return, 
throw. This is really important, especially for some host objects which 
could implement iterator protocol. E.g. File object can implement 
iterator protocol and in their `return` method must close the file 
properly.

- The most common used method are implemented as static.

- Every method returns new Iter instance in order to allow chaining 
calls e.g. `Iter.range(10).filter((x) => x % 2).accumulate()`

I am open for discussion, and contributions. Any improvements are welcome.

Back to comp.lang.javascript | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

ES6 itertools Asen Bozhilov <asen.bozhilov@gmail.com> - 2015-12-16 22:30 +0200
  Re: ES6 itertools Scott Sauyet <scott.sauyet@gmail.com> - 2015-12-22 08:37 -0800

csiph-web