Enrique\m/Talavera kiquetal

Scala for comprehension translation helper

"For comprehension" is a another syntaxe to use map, flatMap and withFilter (or filter) methods.

yield keyword is used to aggregate values in the resulting structure.

This composition can be used on any type implementing this methods, like List, Option, Future...

The introduction to Reactive Programming you've been missing

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

It seems that it does not matter what timezone is on the server as long as you have the time set right for the current timezone, know the timezone of the datetime columns that you store, and are aware of the issues with daylight savings time.

On the other hand if you have control of the timezones of the servers you work with then you can have everything set to UTC internally and never worry about timezones and DST.

Here are some notes I collected of how to work with timezones as a form of cheatsheet for myself and others which might influence what timezone the person will choose for his/her server and how he/she will store date and time.

MySQL Timezone Cheatsheet

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

It seems that it does not matter what timezone is on the server as long as you have the time set right for the current timezone, know the timezone of the datetime columns that you store, and are aware of the issues with daylight savings time.

On the other hand if you have control of the timezones of the servers you work with then you can have everything set to UTC internally and never worry about timezones and DST.

Here are some notes I collected of how to work with timezones as a form of cheatsheet for myself and others which might influence what timezone the person will choose for his/her server and how he/she will store date and time.

	#############################################
	# Push de la rama actual
	git push origin $rama_actual

	#############################################
	# Volver a un commit anterior, descartando los cambios
	git reset --HARD $SHA1

	#############################################
	# Ver y descargar Ramas remotas

	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD

	- [ ] Math
	- [ ] Linear Algebra
	- [ ] Lay - Linear Algebra
	- [ ] 18.06 Linear Algebra
	http://www.scotthyoung.com/blog/mit-challenge/#more-link1806
	- [ ] Burke Lecture Notes
	http://www.math.washington.edu/~burke/crs/407/lectures/
	- [ ] Coding The Matrix
	http://www.amazon.com/dp/0615880991/?tag=coursera-course198-20
	- [ ] Quantifying Uncertainty

	var CryptoJS = require("crypto-js");//replace thie with script tag in browser env

	//encrypt
	var rawStr = "hello world!";
	var wordArray = CryptoJS.enc.Utf8.parse(rawStr);
	var base64 = CryptoJS.enc.Base64.stringify(wordArray);
	console.log('encrypted:', base64);

	//decrypt
	var parsedWordArray = CryptoJS.enc.Base64.parse(base64);

	fun ViewManager.appBarLayout(init: AppBarLayout.() -> Unit = {}) =
	__dslAddView({ AppBarLayout(it) }, init, this)

	fun ViewManager.collapsingToolbarLayout(init: CollapsingToolbarLayout.() -> Unit = {}) =
	__dslAddView({ CollapsingToolbarLayout(it) }, init, this)

	fun ViewManager.coordinatorLayout(init: CoordinatorLayout.() -> Unit = {}) =
	__dslAddView({ CoordinatorLayout(it) }, init, this)

	fun ViewManager.floatingActionButton(init: FloatingActionButton.() -> Unit = {}) =