Queue/Definition: Difference between revisions

=={{header|Nanoquery}}==

This is a fully-featured FIFO queue class definition. In addition to the functions required by the task, it also demonstrates redefining operators for Nanoquery classes by redefining +, *, and =.

<lang Nanoquery>class FIFO

declare contents

// define constructors for FIFO objects

def FIFO()

this.contents = {}

end

def FIFO(contents)

this.contents = contents

end

// define methods for this class

def push(value)

contents.append(value)

end

def pop()

if !this.empty()

value = contents[len(contents) - 1]

contents.remove(len(contents) - 1)

return value

else

// we could throw our own exception here but

// we'll return null instead

return null

end

end

def length()

return len(contents)

end

def extend(itemlist)

contents += itemlist

end

def empty()

return len(contents) = 0

end

// define operators for this class

def toString()

return str(contents)

end

def operator+(other)

return this.contents + other.contents

end

def operator*(n)

return this.contents * n

end

def operator=(other)

return this.contents = other.contents

end

end</lang>