Functional Patterns - Pair Reducing

How to manipulate each pair of a collection. grouped ======= If you want to merge each two elements of a collection, like ```` 1 2 3 4 5 | v 1 + 2 3 + 4 5 ``` Going on with Scala for example use Solution I (better) 1. `grouped` 1. `map` ```scala val grouped = collection.grouped(2).toSeq val pairReduced = grouped.map(pair => {pair(0) + pair(1)}) pairReduced foreach println ``` Solution II 1. `zipWithIndex` 1. `groupBy` 1. `zip` 1. `map` ```scala val divided = collection.zipWithIndex.groupBy{case (e, i) => {(i + 1)%2}} val zipped = divided(0) zip divided(1) val pairs = zipped.map(pair => { pair._1._1 + pair._2._1 }) ```

Functional Patterns - zip

How to manipulate each pair of two collections. zip === Let's say two lists you have and you want to add each pair of them, like ``` 1 + 6 2 + 7 3 + 8 4 + 9 5 + 10 ``` Going on with Scala ```scala List a 1 2 3 4 5 ``` ```scala List b 6 7 8 9 10 ``` ```scala val c = a zip b ``` ```scala List c (1, 6) (2, 7) (3, 8) (4, 9) (5, 10) ``` ```scala val results = c map {case (a, b) => {a + b}} ```

LilyPond: How to write Two Voices on Violin

``` \score { \new Staff \relative c'' { << { c16 a' b a } \\ { c,2 } >> %\override NoteColumn.ignore-collision = ##t << { c16 a' b a } \\ { c,2 } >> \mergeDifferentlyHeadedOn << { c16 a' b a } \\ { c,2 } >> %\override NoteColumn.ignore-collision = ##t << { c16 a' b a } \\ { c,2 } >> % This is the best \mergeDifferentlyHeadedOn << { c16 a' b a } \\ { c,2 } >> \override NoteColumn.ignore-collision = ##t << { c16 a' b a } \\ { c,2 } >> } \layout {} \midi {} } ```

Markdown on Blogger with marked.js

Test ==== - a - b - c Using marked.js --------------- This is a trial. Tag test -------- <code> Here is a code. </code> As to use Markdown on Blogger, set this at the nearest place to the end tag of body. ```html <!-- Markdown: marked.js --> <script src="//cdnjs.cloudflare.com/ajax/libs/marked/0.3.2/marked.min.js"></script> <script> var md = document.getElementsByClassName('md')[0] var divElem = document.createElement('div') var mdMarked = marked(md.value) divElem.innerHTML = mdMarked md.parentNode.replaceChild(divElem, md) </script> ``` and write Markdown in md tag on HTML tab. For the dynamic template you should consider the top page which contains several articles, and write codes like, ```html <!-- jQuery --> <script src='//code.jquery.com/jquery-2.1.4.min.js'/> <!-- Markdown: marked.js --> <script src='//cdnjs.cloudflare.com/ajax/libs/marked/0.3.2/marked.min.js'/> <script> jQuery.noConflict() jQuery("textarea").ready(function() { convMd() }) // for the rest of textarea elements jQuery("textarea").fadeIn(1000, function() { convMd() }) function convMd(){ //console.log("I showed up"); var mds = document.getElementsByClassName('md') for (var i=0, md; md = mds[i]; i++) { var divElem = document.createElement('div') var mdMarked = marked(md.value) divElem.innerHTML = mdMarked md.parentNode.replaceChild(divElem, md) } } </script> ```

difference between method and function in Scala

The official ScalaReference says Method types do not exist as types of values. [cont.] #scala #scalajp

— Rhizome (@rhizome1976) August 19, 2013

If a method name is used as a value, its type is implicitly converted to a corresponding function type (§6.26). #scala #scalajp

— Rhizome (@rhizome1976) August 19, 2013