| iex(1)> Foo.Correspondence.validate_number("234-555-6789") | |
| {:ok, "Verizon Wireless", "mobile"} |
| # This Crystal source file is a multiple threaded implementation to perform an | |
| # extremely fast Segmented Sieve of Zakiya (SSoZ) to find Twin Primes <= N. | |
| # Inputs are single values N, or ranges N1 and N2, of 64-bits, 0 -- 2^64 - 1. | |
| # Output is the number of twin primes <= N, or in range N1 to N2; the last | |
| # twin prime value for the range; and the total time of execution. | |
| # This code was developed on a System76 laptop with an Intel I7 6700HQ cpu, | |
| # 2.6-3.5 GHz clock, with 8 threads, and 16GB of memory. Parameter tuning | |
| # probably needed to optimize for other hardware systems (ARM, PowerPC, etc). |
| # This file contains the configuration for Credo and you are probably reading | |
| # this after creating it with `mix credo.gen.config`. | |
| # | |
| # If you find anything wrong or unclear in this file, please report an | |
| # issue on GitHub: https://github.com/rrrene/credo/issues | |
| # | |
| %{ | |
| # | |
| # You can have as many configs as you like in the `configs:` field. | |
| configs: [ |
| defmodule Web do | |
| require Logger | |
| @behaviour :elli_handler | |
| def handle(r, _args) do | |
| Router.handle(:elli_request.method(r), :elli_request.path(r), r) | |
| rescue | |
| exception -> | |
| Logger.error(inspect(exception)) |
| import evdev | |
| from evdev import * | |
| from azure.storage.queue import QueueService, QueueMessageFormat | |
| import threading | |
| import time | |
| from queue import * | |
| import datetime | |
| # responsible for uploading the barcodes to the azure storage queue. | |
| class BarcodeUploader: |
FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.
| # Base settings and GC logging | |
| -server -XX:+AlwaysPreTouch # First should be default, but we make it explicit, second pre-zeroes memory mapped pages on JVM startup -- improves runtime performance | |
| # -Xloggc:gc-%t.log # CUSTOMIZE LOCATION HERE - $path/gc-%t.log -- the %t in the gc log file path is so we get a new file with each JVM restart | |
| -XX:NumberOfGCLogFiles=5 -XX:+UseGCLogFileRotation -XX:GCLogFileSize=20m # Limits the number of files, logs to folder | |
| -XX:+PrintGC -XX:+PrintGCDateStamps -XX:+PrintGCDetails -XX:+PrintHeapAtGC -XX:+PrintGCCause | |
| -XX:+PrintTenuringDistribution -XX:+PrintReferenceGC -XX:+PrintAdaptiveSizePolicy # gather info on object age & reference GC time for further tuning if needed. | |
| # G1 specific settings -- probably should be default for multi-core systems with >2 GB of heap (below that, default is probably fine) | |
| -XX:+UseG1GC | |
| -XX:+UseStringDeduplication |
I ran into an issue getting a simple Capybara/Poltergeist feature test suite running against a site that used React.js. The following failure was bubbling up to RSpec.
Failures:
Simple guide for setting up OTG modes on the Raspberry Pi Zero - By Andrew Mulholland (gbaman).
The Raspberry Pi Zero (and model A and A+) support USB On The Go, given the processor is connected directly to the USB port, unlike on the B, B+ or Pi 2 B, which goes via a USB hub.
Because of this, if setup to, the Pi can act as a USB slave instead, providing virtual serial (a terminal), virtual ethernet, virtual mass storage device (pendrive) or even other virtual devices like HID, MIDI, or act as a virtual webcam!
It is important to note that, although the model A and A+ can support being a USB slave, they are missing the ID pin (is tied to ground internally) so are unable to dynamically switch between USB master/slave mode. As such, they default to USB master mode. There is no easy way to change this right now.
It is also important to note, that a USB to UART serial adapter is not needed for any of these guides, as may be documented elsewhere across the int
| module Indexable(T) | |
| def threadpool_map(workers : Int = 8, chunk_size : Int? = nil, &func : T -> R) forall T, R | |
| mutex = Thread::Mutex.new | |
| cs = chunk_size || (self.size**0.5).ceil.to_i | |
| Array(R).build(self.size) do |result| | |
| index = 0 | |
| threads = Array.new(workers) { | |
| Thread.new do | |
| a = b = 0 | |
| loop do |