The Rails Way (Addison-Wesley Professional Ruby Series)

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Redigo is a Go client for the Redis database with support for Print-alike API, Pipelining (including transactions), Pub/Sub, Connection pooling, scripting. Code golf, where the goal is to write a program in the minimum of characters, might be an interesting intellectual exercise, but it leads to writing cryptic code which is just the opposite of what a beginner should be learning. Similarly, I haven’t missed any of the data manipulation functionality in R since I switched to pandas.

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Jump Start Sinatra

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Ruby supports inheritance with dynamic dispatch, mixins and singleton methods (belonging to, and defined for, a single instance rather than being defined on the class). Written for the Mac, it has a number of advantages over online website building tools. Every single Web browser, and even new types of devices like smartwatches use Javascript at some capacity, Partovi said. "Once you reach that level of critical mass, it's not going away," Partovi said. All of the stats I've seen show that PHP is far and away the usage leader over Ruby, and there are tons of PHP plugins out there waiting for you to pick them up.

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Rails Crash Course: A No-Nonsense Guide to Rails Development

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Weaknesses of PHP: Inconsistent syntax, too many ways to do the same thing, a history of bizarre security decisions. It is already considered as the most famous programming language in the world. For a very quick setup of the Free Pascal Compiler & fpGUI Toolkit, download the starter archive (3.5 MB download) from http://www.turbocontrol.com/easyfpgui.htm. Java isn't a perfect programming language though—many schools and classes start with C or C++ because Java gets a lot of its syntax from those earlier languages.

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Rubyisms in Rails (Digital Short Cut)

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However, care must be taken that variables hold the expected kind of object. Under lazy evaluation, the length function will return the value 4 (i.e., the number of items in the list), since evaluating it will not attempt to evaluate the terms making up the list. Lexical closures (also known as static closures, or simply closures) take this one step further by bundling up the lexical (static) scope surrounding the function with the function itself, so that the function carries its surrounding environment around with it wherever it may be used.

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Ruby Programming for Medicine & Biology (08) by Berman,

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Pull Requests are really invigorating for projects. The intellectual merit of this project is the development of a proof architecture for building verified compilers for today’s world of multi-language software: such verified compilers guarantee correct compilation of components and support linking with arbitrary target code, no matter its source. I wrote some sample of programs like a "Hello World", but not real programming in Haskell. 14. There are no protected methods in Smalltalk, so Smalltalk programmers resort to the convention of placing methods that should be protected into a "private protocol" of the class.

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Ruby on Rails Power!: The Comprehensive Guide

Aneesha Bakharia

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But it seems to be more logical to use the for(i=0; i<10; i++){} than using the for i in range(0,9): staff... or sth similar So now I decided something new... Chester College on the de glace inutile ornement. Some other clean OOLs are: Scala is a modern multi-paradigm programming language designed to express common programming patterns in a concise, elegant, and type-safe way. NET platforms, your knowledge on Visual Basic would be quite significance, as it’s one of the key languages for the development of.

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Learning Heroku Postgres

Patrick Espake

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I know the poster of "Mother Tongues" could not fit all languages, but there is one that is highly in use by large and small corporations around the world, has hundreds of thousands of active coders, has been around since the 60's, yet refreshed enough to be an active & viable business language today. Sqrt(x*x+1) ); Func acosh = x => Math. There may be a perfectly easy way to write a beautiful piece of code, but there may be an equally easy way to write an ugly piece of code to perform the exact same task.

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Cucumber Recipes: Automate Anything with BDD Tools and

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AsyncState; var ar = (AsyncResult)async; var fn = (Func)ar. In practical terms, programs that spend more time communicating on channels than doing computation may experience performance degradation when using multiple OS threads. Here is our first Ruby program running inside the Ruby In Steel environment for Visual Studio Currently much of the excitement surrounding Ruby can be attributed to a web development framework called Rails – giving a combination which is popularly known as ‘ Ruby On Rails ’.

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Python: Learn Python Programming - Beginner Guide (Python

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Legacy languages including COBOL and FORTRAN look like they’re finally starting to be replaced. Best of all one doesn’t need to set up and compile a whole program just to confirm that 42 is indeed an instance of a Fixnum class – instant interactivity is the key. Net the choice over Java among businesses of all sizes and industries, thanks to its promotion via Visual Studio and SharePoint. What kind of raises engineers get over time. baz)/' < file.txt # print only lines of 65 characters or greater $ ruby -pe 'next unless $_.chomp.length >= 65' < file.txt $ ruby -lpe 'next unless $_.length >= 65' < file.txt # print only lines of 65 characters or less $ ruby -pe 'next unless $_.chomp.length < 65' < file.txt $ ruby -lpe 'next unless $_.length < 65' < file.txt # print section of file from regex to end of file $ ruby -pe '@found=true if $_ =~ /regex/; next unless @found' < file.txt # print section of file based on line numbers (eg. lines 2-7 inclusive) $ ruby -pe 'next unless $. >= 2 && $. < = 7' < file.txt # print line number 52 $ ruby -pe 'next unless $. == 52' < file.txt # print every 3rd line starting at line 4 $ ruby -pe 'next unless $. >= 4 && $. % 3 == 0' < file.txt # print section of file between two regular expressions, /foo/ and /bar/ $ ruby -ne '@found=true if $_ =~ /foo/; next unless @found; puts $_; exit if $_ =~ /bar/' < file.txt # print all of file except between two regular expressions, /foo/ and /bar/ $ ruby -ne '@found = true if $_ =~ /foo/; puts $_ unless @found; @found = false if $_ =~ /bar/' < file.txt # print file and remove duplicate, consecutive lines from a file (emulates 'uniq') $ ruby -ne 'puts $_ unless $_ == @prev; @prev = $_' < file.txt # print file and remove duplicate, non-consecutive lines from a file (careful of memory!) $ ruby -e 'puts STDIN.readlines.sort.uniq!.to_s' < file.txt # print file except for first 10 lines $ ruby -pe 'next if $. <= 10' < file.txt # print file except for last line $ ruby -e 'lines=STDIN.readlines; puts lines[0,lines.size-1]' < file.txt # print file except for last 2 lines $ ruby -e 'lines=STDIN.readlines; puts lines[0,lines.size-2]' < file.txt # print file except for last 10 lines $ ruby -e 'lines=STDIN.readlines; puts lines[0,lines.size-10]' < file.txt # print file except for every 8th line $ ruby -pe 'next if $. % 8 == 0' < file.txt # print file except for blank lines $ ruby -pe 'next if $_ =~ /^\s*$/' < file.txt # delete all consecutive blank lines from a file except the first $ ruby -e 'BEGIN{$/=nil}; puts STDIN.readlines.to_s.gsub(/\n(\n)+/, "\n\n")' < file.txt # delete all consecutive blank lines from a file except for the first 2 $ ruby -e 'BEGIN{$/=nil}; puts STDIN.readlines.to_s.gsub(/\n(\n)+/, "\n\n")' < file.txt # delete all leading blank lines at top of file $ ruby -pe '@lineFound = true if $_ !~ /^\s*$/; next if !@lineFound' < file.txt

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