dmitriz

```sh
➜  ~ stack install sized               

Error: While constructing the build plan, the following exceptions were encountered:

In the dependencies for sized-0.3.0.0:
    equational-reasoning must match >=0.5, but the stack configuration has no specified version  (latest matching
                         version is 0.6.0.0)
    ghc-typelits-presburger must match >=0.2.0.0, but the stack configuration has no specified version  (latest
                            matching version is 0.2.0.5)

dmitriz

With no local config present, `stack` is picking the old ghc 8.2.2:

```sh
➜  test stack ghci

Note: No local targets specified, so a plain ghci will be started with no package hiding or package options.
      
      You are using snapshot: lts-11.9
      
      If you want to use package hiding and options, then you can try one of the following:

dmitriz

λ [9]: fmap f [1]                                                                                                             
Out [9]: 

<interactive>:186:1: error:
    • Ambiguous type variable ‘f0’ arising from a use of ‘print’
      prevents the constraint ‘(Show (f0 Integer))’ from being solved.
      Probable fix: use a type annotation to specify what ‘f0’ should be.
      These potential instances exist:
        instance Show a => Show (ZipList a)
          -- Defined in ‘Control.Applicative’

dmitriz

Trying to install
https://github.com/litxio/ptghci

✗ cabal v2-build  
Build profile: -w ghc-8.0.1 -O1
In order, the following will be built (use -v for more details):
 - ptghci-0.1.0.0 (lib) (first run)
 - ptghci-0.1.0.0 (exe:ptghci) (first run)
Preprocessing library for ptghci-0.1.0.0..
Building library for ptghci-0.1.0.0..

dmitriz

✗ cabal v2-build
Warning: The package list for 'hackage.haskell.org' does not exist. Run 'cabal
update' to download it.
Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] next goal: ptghci (user goal)
[__0] rejecting: ptghci-0.1.0.0 (conflict: pkg-config package python3-any, not
found in the pkg-config database)
[__0] fail (backjumping, conflict set: ptghci)
After searching the rest of the dependency tree exhaustively, these were the

dmitriz

✗ ghcup install
Installing GHC-8.6.5 for Darwin on architecture x86_64
usage: mktemp [-d] [-q] [-t prefix] [-u] template ...
       mktemp [-d] [-q] [-u] -t prefix 
Failed to create temporary directory

dmitriz

High level style in javascript.

Opinions are like assholes, every one has got one.

This one is mine.

Punctuation: who cares?

Punctuation is a bikeshed. Put your semicolons, whitespace, and commas where you like them.

dmitriz

var _ = require('lodash');
var log = require('../core/log.js');

var RSI = require('./indicators/RSI.js');

// let's create our own method
var method = {};

// prepare everything our method needs
method.init = function() {

dmitriz

Let us make the array functor slightly uglier.

According to Functor's definition, for every type a, we first need to define the type F(a), the set of all admissible values for our Functor.

For the array Functor Array, that would be the set [a] of all arrays with entries of type a.

We now define a new Functor F, where we slightly change the set of values F(a): Namely, we say that an array arr is of type F(a) if either

dmitriz

const Task = require('data.task')

Task.prototype.alt = function (that) {
  return new Task((rej, res) =>
    this.fork(_ => that.fork(rej, res), res))
}

const hosts = [
  [ 'db1.mysite.com', 'user', 'password' ],
  [ 'db2.mysite.com', 'user', 'password' ],