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| -rw-r--r-- | chapel.html.markdown | 24 |
1 files changed, 11 insertions, 13 deletions
diff --git a/chapel.html.markdown b/chapel.html.markdown index ec46a083..53e9747c 100644 --- a/chapel.html.markdown +++ b/chapel.html.markdown @@ -5,7 +5,7 @@ contributors: - ["Ian J. Bertolacci", "http://www.cs.colostate.edu/~ibertola/"] --- -You can read all about chapel at [Cray's official Chapel website](http://chapel.cray.com). +You can read all about Chapel at [Cray's official Chapel website](http://chapel.cray.com). In short, Chapel is an open-source, high-productivity, parallel-programming language in development at Cray Inc., and is designed to run on multi-core PCs as well as multi-kilocore supercomputers. More information and support can be found at the bottom of this document. @@ -27,7 +27,7 @@ writeln( "There are ", 3, " commas (\",\") in this line of code" ); stdout.writeln( "This goes to standard output (just like plain writeln( ) does)"); stderr.writeln( "This goes to standard error" ); -// Variables dont have to be explicitly typed as long as +// Variables don't have to be explicitly typed as long as // the compiler can figure out the type that it will hold. var myVar = 10; // 10 is an int, so myVar is implicitly an int myVar = -10; @@ -117,7 +117,7 @@ a = thisInt ^ thatInt; // Bitwise exclusive-or a += thisInt; // Addition-equals ( a = a + thisInt;) a *= thatInt; // Times-equals ( a = a * thatInt; ) b &&= thatBool; // Logical-and-equals ( b = b && thatBool; ) -a <<= 3; // LEft-bit-shift-equals ( a = a << 10; ) +a <<= 3; // Left-bit-shift-equals ( a = a << 10; ) // and many, many more. // Unlike other C family languages there are no // pre/post-increment/decrement operators like @@ -190,7 +190,7 @@ if ( a % 3 == 0 ) { var maximum = if ( thisInt < thatInt ) then thatInt else thisInt; // Select statements are much like switch statements in other languages -// However, Select statements dont cascade like in C or Java +// However, Select statements don't cascade like in C or Java var inputOption = "anOption"; select( inputOption ){ when "anOption" do writeln( "Chose 'anOption'" ); @@ -201,8 +201,6 @@ select( inputOption ){ otherwise { writeln( "Any other Input" ); writeln( "the otherwise case doesn't need a do if the body is one line" ); - writeln( "Oh, and when statements dont cascade like the case statements" ); - writeln( "of other languages" ); } } @@ -246,7 +244,7 @@ for x in 1..10 { // define an index set that can be iterated over. // Ranges are single dimensional // Domains can be multi-dimensional and can -// represent indicies of different types as well. +// represent indices of different types as well. // They are first-class citizen types, and can be assigned into variables var range1to10: range = 1..10; // 1, 2, 3, ..., 10 var range2to11 = 2..11; // 2, 3, 4, ..., 11 @@ -452,7 +450,7 @@ writeln( myChangingArray ); // We can query the type of arguments to generic procedures // Here we define a procedure that takes two arguments of -// the same type, yet we dont define what that type is. +// the same type, yet we don't define what that type is. proc genericProc( arg1 : ?valueType, arg2 : valueType ): void { select( valueType ){ when int do writeln( arg1, " and ", arg2, " are ints" ); @@ -542,7 +540,7 @@ class MyClass { var memberInt : int; var memberBool : bool = true; - // Classes have default constructors that dont need to be coded (see below) + // Classes have default constructors that don't need to be coded (see below) // Our explicitly defined constructor proc MyClass( val : real ){ this.memberInt = ceil( val ): int; @@ -620,10 +618,10 @@ class GenericClass { } // Copy constructor - // Note: We still have to put the the type as an argument, but we can + // Note: We still have to put the type as an argument, but we can // default to the type of the other object using the query (?) operator // Further, we can take advantage of this to allow our copy constructor - // to copy classes of different types + // to copy classes of different types and cast on the fly proc GenericClass( other : GenericClass(?otherType), type classType = otherType ) { this.classDomain = other.classDomain; @@ -773,7 +771,7 @@ Occasionally check back here and on the [Chapel site](http://chapel.cray.com) to ### What this tutorial is lacking: * Modules and standard modules - * Synchronize and atomic variables + * Synchronize variables and atomic operations * Multiple Locales (distributed memory system) * ```proc main(){ ... }``` * Records @@ -805,7 +803,7 @@ and its as easy as 3. ```make``` 4. ```source util/setchplenv.bash # or .sh or .csh or .fish``` -You will need to ```source util/setchplenv.EXT``` from the chapel directory every time your terminal starts so its suggested that you drop that command in a script that will get executed on startup (like .bashrc). +You will need to `source util/setchplenv.EXT` from within the Chapel directory (`$CHPL_HOME`) every time your terminal starts so its suggested that you drop that command in a script that will get executed on startup (like .bashrc). Chapel is easily installed with Brew for OS X |