Salvador Guzman sguzman

JQ to filter JSON by value

Syntax: cat <filename> | jq -c '.[] | select( .<key> | contains("<value>"))'

Example: To get json record having _id equal 611

cat my.json | jq -c '.[] | select( ._id | contains(611))'

Remember: if JSON value has no double quotes (eg. for numeric) to do not supply in filter i.e. in contains(611)

Applied Functional Programming with Scala - Notes

1. Mastering Functions

A function is a mapping from one set, called a domain, to another set, called the codomain. A function associates every element in the domain with exactly one element in the codomain. In Scala, both domain and codomain are types.

val square : Int => Int = x => x * x

These links no longer work. Springer have pulled the free plug.

Graduate texts in mathematics

duplicates = multiple editions

A Classical Introduction to Modern Number Theory, Kenneth Ireland Michael Rosen

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NOTE: the content is out-of-date. All development is moved to the https://github.com/yurydelendik/wasmception

Using WebAssembly in LLVM

Compiling

# locations, e.g.
export WORKDIR=~/llvmwasm; mkdir -p $WORKDIR
export INSTALLDIR=$WORKDIR

	# this original one uses values returned from 'brew info'
	brew list --formula \| xargs -n1 -P8 -I {} \
	sh -c "brew info {} \| egrep '[0-9]* files, ' \| sed 's/^.[0-9] files, \(.\)).$/{} \1/'" \| \
	sort -h -r -k2 - \| column -t

	# faster alternative using 'du'
	du -sch $(brew --cellar)// \| sed "s\|$(brew --cellar)/\([^/]\)/.\|\1\|" \| sort -k1h

	pkgname=duolingo
	pkgver=0.3.1
	pkgrel=1
	pkgdesc="Unofficial release of Duolingo for Linux / Learn languages by playing a game. It's 100% free, fun, and scientifically proven to work."
	url="https://www.duolingo.com/"
	arch=('x86_64')
	license=('custom')
	install=duolingo.install
	source=("https://github.com/mikethedj4/duolingo-linux/raw/master/${pkgname}-linux.tar.gz"
	"duolingo.desktop")

	import sys,os
	import curses

	def draw_menu(stdscr):
	k = 0
	cursor_x = 0
	cursor_y = 0

	# Clear and refresh the screen for a blank canvas
	stdscr.clear()

	func split(buf []byte, lim int) [][]byte {
	var chunk []byte
	chunks := make([][]byte, 0, len(buf)/lim+1)
	for len(buf) >= lim {
	chunk, buf = buf[:lim], buf[lim:]
	chunks = append(chunks, chunk)
	}
	if len(buf) > 0 {
	chunks = append(chunks, buf[:len(buf)])
	}

	def make_markdown_table(array):

	""" Input: Python list with rows of table as lists
	First element as header.
	Output: String to put into a .md file

	Ex Input:
	[["Name", "Age", "Height"],
	["Jake", 20, 5'10],
	["Mary", 21, 5'7]]