Daniel Connelly dhconnelly

Data structures in Go with maps and slices

Sets:

set := make(map[string]bool)

// add to set
set["a"] = true

I hereby claim:

I am dhconnelly on github.
I am dhconnelly (https://keybase.io/dhconnelly) on keybase.
I have a public key whose fingerprint is D398 9646 0911 1113 522F BE63 E048 B342 DE7D BB12

To claim this, I am signing this object:

	module IntMap = Map.Make(Int)
	type data = int IntMap.t
	let empty = IntMap.empty
	let set x pos data = IntMap.add pos x data
	let get pos data = match IntMap.find_opt pos data with
	\| None -> 0
	\| Some x -> x

	let read ic =
	let next_instr () = try Some (Scanf.bscanf ic "%d%c" (fun i _ -> i))

	#!/bin/bash -e

	# depot_tools
	git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
	echo "export PATH=$PWD/depot_tools:$PATH" >> $HOME/.bashrc
	source ~/.bashrc

	# get chromium
	mkdir chromium
	cd chromium

	#!/usr/bin/env python2.7

	import itertools
	import sys

	def contains(filename, string):
	'''Determine whether a file contains a string.'''
	with open(filename) as f:
	for num, line in zip(itertools.count(1), f.readlines()):
	if string in line:


	# what if we have a list, and we want to do something for each item.
	nums = [12, 5, 7, 18, 127, -1337]
	# we will print out each number squared

	# this means: repeatedly take one element from the list "nums"
	# call it "num"
	# and do the stuff in the for loop body.
	for num in nums:
	print num * num



	# let's say we want to keep track of a person.
	# me.

	daniel = {
	'fname': 'Daniel',
	'lname': 'Connelly',
	'age': 25,
	'city': 'Atlanta'

	# sometimes we want to keep track of lots of things, without naming
	# each one individually

	# we want to read some names from the user

	# what if we want to hold onto all of the names and do something with
	# them later?

	# for instance, we want to print them in reverse

	# -----------------------------------------------------------------------------
	# A brief tutorial on functions
	# by Daniel Connelly ([email protected])
	# -----------------------------------------------------------------------------

	# Sometimes we want to re-use a piece of programming logic. Copy-and-paste is
	# not necessarily a good approach, as it is prone to errors and duplicates
	# work. A good maxim is "Don't Repeat Yourself." Let's see how we can use
	# functions to eliminate repetition.