Here is a summary of boo's built-in functions. The actual source code underlying these functions is in Boo/Lang/Builtins.cs.
array is a function used to create empty arrays or convert IEnumerable and ICollection objects to arrays. See Lists And Arrays for more info.
Converts an IEnumerable object to a non-specific (type of System.Object) array.
Converts any object that implements ICollection to an array of Type.
Converts any object that impelements IEnumerable to an array of Type.
Creates an empty array of the specified size.
BooVersion is a builtin property that returns the current version of boo that is running. It returns a System.Version class. See Getting Boo Version for more info.
enumerate() is useful when you want to keep a running count while looping through items using a for loop:
mylist = ["a", "b", "c"] for i as int, obj in enumerate(mylist): print i, ":", obj
Returns a string of input that originates from Console.ReadLine() - AKA, "Standard Input."
The equivilent of Console.ReadLine(). See also prompt() below.
Usually not necessary, this builtin returns any Enumerator it can find in the object passed. For loops do this for you.
Always returning a string, join is a function that will walk through an enumerable object and put all of those elements into one string.
Joins all of the elements in enumerable into one string, using a single space (ASCII Code: 32) between elements.
The same as join(enumerable as IEnumerable), except that seperator defines what character seperates each element in enumerable.
map returns an enumerable object that applies a specific function to each element in an enumerable object.
Taking an enumerable object such as a list or a collection, it returns an IEnumerable object that applies "function" to each element in the array.
def HardRock(item): return "$item totally rocks out, man!" wyclefSongs = ("Two wrongs", "Dirty Dancing") x = map(wyclefSongs, HardRock) for y in x: print y //another example using a multiline anonymous closure: newlist = map([1,2,3,4,5,6]) def (x as int): return x*x*x
Two wrongs totally rocks out, man! Dirty Dancing totally rocks out, man!
See Multidimensional Arrays for more info, but here is a basic example:
Creates a multidimensional array of type elementType with the specifications of length.
foo = matrix(int, 2, 2) foo[0, 0] = 0 foo[0, 1] = 1 foo[1, 0] = 2 foo[1, 1] = 3 print join(foo) //prints "0, 1, 2, 3" /* Looks like, [0, 1 2, 3] */
Prints an object to Standard Out. The equivilent of Console.WriteLine
The equivilent of Console.WriteLine()
Prompts the user for information.
Prints query to standard output, then waits for a user to 'respond.' Returns a string containing what the user has typed.
A mysterious, somewhat exciting function that returns an enumerable object containing a list of elements such as 1 to 10 or 0 to 5 or 77 to 6.
Returns an IEnumerable object that contains elements from 0 to max - 1.
#This prints 0 through 9: for i in range(10): print i
Returns an IEnumerable object that contains elements from begin to end - 1.
Returns an IEnumerable object that contains all of the elements from begin to end - 1 that match the interval of step.
for i in range(0, 10, 2): print i
0 2 4 6 8
Returns items in an enumerable in reverse order.
shell is used for invoking processes and inspecting their output.
Invoke an application (filename) with the arguments (arguments) specified. Returns a string containing the program's output to Standard Out (aka, the console)
Invoke an application (filename) with an array of arguments (arguments); returns a string containing program's output.
Starts a process specified by filename with the arguments provided and returns a Process object representing the newly born process.
zip returns an IEnumerable object that interleaves the two arrays.
zip will return an IEnumerable object, wherein each element of the IEnumerable object will be a one dimensional array containing two elements; the first element will be an element located in "firstNames" and the second will be an element located in "lastNames."
firstNames = ("Charles", "Joe", "P") lastNames = ("Whittaker", "Manson", "Diddy") x = zip(firstNames, lastNames) for y in x: print join(y) //print y, y
Charles Whittaker Joe Manson P Diddy