Andy Pan andy0130tw

Nginx FastCGI response buffer sizes

By default when Nginx starts receiving a response from a FastCGI backend (such as PHP-FPM) it will buffer the response in memory before delivering it to the client. Any response larger than the set buffer size is saved to a temporary file on disk.

This process is outlined at the Nginx ngx_http_fastcgi_module page manual page.

Introduction
Determine actual FastCGI response sizes
Setting the buffer size
Verifying results

Easy parallel python with concurrent.futures

As of version 3.3, python includes the very promising concurrent.futures module, with elegant context managers for running tasks concurrently. Thanks to the simple and consistent interface you can use both threads and processes with minimal effort.

For most CPU bound tasks - anything that is heavy number crunching - you want your program to use all the CPUs in your PC. The simplest way to get a CPU bound task to run in parallel is to use the ProcessPoolExecutor, which will create enough sub-processes to keep all your CPUs busy.

We use the context manager thusly:

with concurrent.futures.ProcessPoolExecutor() as executor:

JavaScript Static Analysis Tools

Most people are familiar with these three tools:

[JSHint][1]
[JSLint][2]
[Google Closure Linter][3]

The first one is more popular among developers because it is style-agnostic. The other two enforce rules of [Crockford Style][4] and [Google Code Style][5] respectively.

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

	CFLAGS = -std=c99 -Wall

	main : main.o

	.PHONY : test clean

	test : main
	./$^ "regex" "vtable" < main.c

	clean :

	/**
	* VH and VW units can cause issues on iOS devices: http://caniuse.com/#feat=viewport-units
	*
	* To overcome this, create media queries that target the width, height, and orientation of iOS devices.
	* It isn't optimal, but there is really no other way to solve the problem. In this example, I am fixing
	* the height of element `.foo` —which is a full width and height cover image.
	*
	* iOS Resolution Quick Reference: http://www.iosres.com/
	*/

	From 759df18a9c8ec05c6830687682c57d9e4c6a55d3 Mon Sep 17 00:00:00 2001
	From: Jiang Jiang <[email protected]>
	Date: Sat, 26 Jul 2014 21:33:19 +0200
	Subject: [PATCH 1/3] Fix CID-keyed fonts glyph lookup

	Keep cff_charsets parsed from CID font around if exists. Use the
	cff_charsets to do GID -> CID lookup.
	---
	texk/dvipdfm-x/cff.c \| 14 ++++++++------
	texk/dvipdfm-x/cff.h \| 1 +

	<script type="text/ng-template" id="one.html">
	<div>This is first template</div>
	</script>

	<script type="text/ng-template" id="two.html">
	<div>This is second template</div>
	</script>

	//-------------------------------------------------------------
	//
	// Hypothesis:
	//
	// Promises/A is a Monad
	//
	// To be a Monad, it must provide at least:
	// - A unit (aka return or mreturn) operation that creates a corresponding
	// monadic value from a non-monadic value.
	// - A bind operation that applies a function to a monadic value

	var parser = document.createElement('a');
	parser.href = "http://example.com:3000/pathname/?search=test#hash";

	parser.protocol; // => "http:"
	parser.hostname; // => "example.com"
	parser.port; // => "3000"
	parser.pathname; // => "/pathname/"
	parser.search; // => "?search=test"
	parser.hash; // => "#hash"
	parser.host; // => "example.com:3000"