henyihanwobushi

public class BaseQueryValidator {
    private static List<String> extractTableAliases(SqlNode node) {
        final List<String> tables = new ArrayList<>();

        // If order by comes in the query.
        if (node.getKind().equals(SqlKind.ORDER_BY)) {
            // Retrieve exact select.
            node = ((SqlSelect) ((SqlOrderBy) node).query).getFrom();
        } else {
            node = ((SqlSelect) node).getFrom();

henyihanwobushi

<?xml version="1.0" encoding="UTF-8"?>

<!--
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License.  You may obtain a copy of the License at

henyihanwobushi

#!/bin/sh
# a simple way to parse shell script arguments
# please edit and use to your own content

ENVIRONMENT="dev"
DB_PATH="/data/db"

function usage()
{
    echo "if this was a real script you would see something useful here"

henyihanwobushi

brew cask install haskell-platform
echo 'export PATH="$PATH/Library/Haskell/bin:$PATH"' >> ~/.bash_profile
cabal update
cabal install -j8 happy
cabal install -j8 stylish-haskell
cabal install -j8 hlint
cabal install -j8 hsdev hasktags
cabal install -j8 ghc-mod
# Sublime: install SublimeHaskell package
# VS Code: install "Haskell ghc-mod", "Haskell Syntax Highlighting", "haskell-linter", "stylish-haskell" extensions

henyihanwobushi

"""Distance helpers."""

import math


EARTH_CIRCUMFERENCE = 6378137     # earth circumference in meters


def great_circle_distance(latlong_a, latlong_b):
    """

henyihanwobushi

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

So you're curious in learning this new thing called (Functional) Reactive Programming (FRP).

Learning it is hard, even harder by the lack of good material. When I started, I tried looking for tutorials. I found only a handful of practical guides, but they just scratched the surface and never tackled the challenge of building the whole architecture around it. Library documentations often don't help when you're trying to understand some function. I mean, honestly, look at this:

Rx.Observable.prototype.flatMapLatest(selector, [thisArg])

Projects each element of an observable sequence into a new sequence of observable sequences by incorporating the element's index and then transforms an observable sequence of observable sequences into an observable sequence producing values only from the most recent observable sequence.