Huxpro

JS interpreter performance

On Macbook Pro 16"

Native

λ v8 --jitless benchmark.js
Richards: 1147
Crypto: 845

Huxpro

  CDN: trunk Relative path: CocoaPods-version.yml exists! Returning local because checking is only perfomed in repo update

Updating spec repo `trunk`
  CDN: trunk Relative path: deprecated_podspecs.txt, has ETag? W/"5fd0a021-7b4c0"
  CDN: trunk Relative path not modified: deprecated_podspecs.txt
  CDN: trunk Going to update 14 files
  CDN: trunk Relative path: all_pods_versions_e_d_6.txt, has ETag? W/"5fd09df2-266"
  CDN: trunk Relative path: all_pods_versions_3_2_5.txt, has ETag? W/"5fd09df2-593"
  CDN: trunk Relative path: all_pods_versions_5_d_0.txt, has ETag? W/"5fd09df2-2d8"
  CDN: trunk Relative path: all_pods_versions_2_7_2.txt, has ETag? W/"5fd09df2-3d3"

Huxpro

react-native/packages/rn-tester git/feat/ios-hermes-try*
λ env USE_FRAMEWORKS=1 USE_HERMES=1  pod install
Installing pods with use_frameworks!
Using Hermes engine
Analyzing dependencies
Fetching podspec for `libevent` from `../../third-party-podspecs/libevent.podspec`
Downloading dependencies
Installing RCT-Folly 2020.01.13.00
Installing React-Core 1000.0.0
Installing hermes-engine (0.7.1)

Huxpro

/**

  class Super {
    x = "super"
  }

*/

class Super { 
  constructor() {

Huxpro

// 试了两种方式模拟：

class Super { 
  constructor() {
    this.x = "super" 
  }
};

// 这样的话也是 own property
new Super().hasOwnProperty('x') // true

Huxpro

import 'package:flutter/material.dart';

/// A TextField that maintain selection state like React Native
class TextInput extends StatefulWidget {

  TextInput({@required this.decoration, @required this.text, @required this.onChanged});

  final String text;
  final InputDecoration decoration;
  final Function onChanged;

Huxpro

{-# LANGUAGE
    GADTs, 
    ExistentialQuantification
 #-}

import Control.Monad
import Data.IORef
import Data.Sequence
import Data.Foldable

Huxpro

OK, so today I was looking at Writer monad, a very basic Monad.

In its essence, it's just a Monad that outputs (e.g. log) something,
The "Variation three: Output" Monad from the original Monads for functional programming, 92 paper is very lean:

type M a = (Output, a)
type Output = String

Huxpro

Hi folks, I just wanna share my story on my first day trying Cabal/Stack.

So I was learning Haskell for half a semester but only live within ghci and runhaskell. But today I was thinking of playing with /write-you-a-haskell/chapter4/untyped so I pulled it down.

I was first trying to follow the README.md which asked me to do cabal run. It failed and gave me errors on the ambiguous usage of <>, I realized cabal is using my global GHC version and it might be some breaking changes there. (since it's Haskell)

I heard stack can solve this problem by having multiple GHC so I changed to looking into that. So I run stack build, see the new GHC being downloaded, but failed. The resolver of the project is 7.8.4 and the problem is ar permission errors on OS X 10.11 El Capitan with GHC 7.8.4 . I tried several workarounds posted in the issue page but none of them works.

Aft

Huxpro

module type Set = sig
  type 'a t
  val empty : 'a t
  val isEmpty : 'a t -> bool
end

module ListSet : Set = struct
  type 'a t = 'a list
  let empty = []
  let isEmpty l = l == []