exercism

Exercism solutions.
git clone git://code.dwrz.net/exercism
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README.md (3244B)

      1 # Hello World
      2 
      3 The classical introductory exercise. Just say "Hello, World!".
      4 
      5 ["Hello, World!"](http://en.wikipedia.org/wiki/%22Hello,_world!%22_program) is
      6 the traditional first program for beginning programming in a new language
      7 or environment.
      8 
      9 The objectives are simple:
     10 
     11 - Write a function that returns the string "Hello, World!".
     12 - Run the test suite and make sure that it succeeds.
     13 - Submit your solution and check it at the website.
     14 
     15 If everything goes well, you will be ready to fetch your first real exercise.
     16 
     17 # Welcome to Bash!
     18 
     19 Unlike many other languages here, bash is a bit of a special snowflake.
     20 If you are on a Mac or other unix-y platform, you almost definitely
     21 already have bash. In fact, anything you type into the terminal is
     22 likely going through bash.
     23 
     24 The downside to this is that there isn't much of a development
     25 ecosystem around bash like there is for other languages, and there are
     26 multiple versions of bash that can be frustratingly incompatible. Luckily
     27 we shouldn't hit those differences for these basic examples, and if you
     28 can get the tests to pass on your machine, we are doing great.
     29 
     30 ## Installation
     31 
     32 As mentioned above, if you are on a unix-like OS (Mac OS X, Linux, Solaris,
     33 etc), you probably already have bash.
     34 
     35 ## Testing
     36 
     37 As there isn't much of a bash ecosystem, there also isn't really a de
     38 facto leader in the bash testing area. For these examples we are using
     39 [bats](https://github.com/sstephenson/bats). You should be able to
     40 install it from your favorite package manager, on OS X with homebrew
     41 this would look something like this:
     42 
     43 ```
     44 $ brew install bats
     45 ==> Downloading
     46 https://github.com/sstephenson/bats/archive/v0.4.0.tar.gz
     47 ==> Downloading from
     48 https://codeload.github.com/sstephenson/bats/tar.gz/v0.4.0
     49 ########################################################################
     50 100.0%
     51 ==> ./install.sh /opt/boxen/homebrew/Cellar/bats/0.4.0
     52 🍺  /opt/boxen/homebrew/Cellar/bats/0.4.0: 10 files, 60K, built in 2
     53 seconds
     54 ```
     55 
     56 
     57 
     58 Run the tests with:
     59 
     60 ```bash
     61 bats hello_world_test.sh
     62 ```
     63 
     64 After the first test(s) pass, continue by commenting out or removing the `skip` annotations prepending other tests.
     65 
     66 ## Source
     67 
     68 This is an exercise to introduce users to using Exercism [http://en.wikipedia.org/wiki/%22Hello,_world!%22_program](http://en.wikipedia.org/wiki/%22Hello,_world!%22_program)
     69 
     70 
     71 ## External utilities
     72 `Bash` is a language to write scripts that works closely with various system utilities,
     73 like [`sed`](https://www.gnu.org/software/sed/), [`awk`](https://www.gnu.org/software/gawk/), [`date`](https://www.gnu.org/software/coreutils/manual/html_node/date-invocation.html) and even other programming languages, like [`Python`](https://www.python.org/).
     74 This track does not restrict the usage of these utilities, and as long as your solution is portable
     75 between systems and does not require installing third party applications, feel free to use them to solve the exercise.
     76 
     77 For an extra challenge, if you would like to have a better understanding of the language,
     78 try to re-implement the solution in pure `Bash`, without using any external tools.
     79 
     80 ## Submitting Incomplete Solutions
     81 It's possible to submit an incomplete solution so you can see how others have completed the exercise.