class Array
Public Instance Methods
pad( len, val=nil )
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Pad an array with a given value
upto a given length
.
[0,1,2].pad(6,"a") #=> [0,1,2,"a","a","a"]
If length
is a negative number padding will be added to the beginning of the array.
[0,1,2].pad(-6,"a") #=> ["a","a","a",0,1,2] CREDIT: Richard Laugesen
# File lib/antlr3/test/core-extensions.rb, line 243 def pad( len, val=nil ) return dup if self.size >= len.abs if len < 0 Array.new( ( len+size ).abs,val ) + self else self + Array.new( len-size,val ) end end
pad!( len, val=nil )
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Like pad
but changes the array in place.
a = [0,1,2] a.pad!(6,"x") a #=> [0,1,2,"x","x","x"] CREDIT: Richard Laugesen
# File lib/antlr3/test/core-extensions.rb, line 260 def pad!( len, val=nil ) return self if self.size >= len.abs if len < 0 replace Array.new( ( len+size ).abs,val ) + self else concat Array.new( len-size,val ) end end