José Juan Sánchez josejuansanchez

If you’re using an HTTPS URL to push over, the Git server will ask you for your username and password for authentication. By default it will prompt you on the terminal for this information so the server can tell if you’re allowed to push.

If you don’t want to type it every single time you push, you can set up a “credential cache”. The simplest is just to keep it in memory for a few minutes, which you can easily set up by running:

git config --global credential.helper cache.

For more information on the various credential caching options available, see “Credential Storage”.

$ git config --global credential.helper cache
# Set git to use the credential memory cache

To change the default password cache timeout, enter the following:

$ git config --global credential.helper 'cache --timeout=3600'
# Set the cache to timeout after 1 hour (setting is in seconds)

Configuring a remote for a fork

List the current configured remote repository for your fork.

git remote -v

Specify a new remote upstream repository that will be synced with the fork.

git remote add upstream https://github.com/P2PSP/p2psp.git

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

	#!/bin/bash

	set -x

	# Set the directory to store the images
	IMAGES_DIRECTORY=images

	if [ ! -d "${IMAGES_DIRECTORY}" ]; then
	echo "Creando nuevo directorio: ${IMAGES_DIRECTORY}"
	mkdir -p ${IMAGES_DIRECTORY}

	#include <stdio.h>
	#include <stdlib.h>

	int main(int argc, char *argv[])
	{
	if (argc < 4) {
	printf("Usage: %s <initial_value> <increment> <#total>\n", argv[0]);
	return 1;
	}

	#define PIN_ID 13

	void setup() {
	Serial.begin(9600);
	pinMode(PIN_ID, OUTPUT);
	}

	void loop() {
	if (Serial.available() > 0) {

	# A simple internet-chat application

	import network
	import sys

	def heard(phrase):
	print("them:" + phrase)

	if (len(sys.argv) >= 2):
	network.call(sys.argv[1], whenHearCall=heard)

	package com.example.testSingleton;

	import android.app.Activity;
	import android.content.Intent;
	import android.os.Bundle;
	import android.widget.Toast;

	public class ActivityA extends Activity {
	@Override
	public void onCreate(Bundle savedInstanceState) {

	Recuerda incluir este permiso

	<uses-permission android:name="android.permission.INTERNET" />