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Contents
describe "Array#collect" do
it "returns a copy of array with each element replaced by the value returned by block" do
a = ['a', 'b', 'c', 'd']
b = a.collect { |i| i + '!' }
b.should == ['a!', 'b!', 'c!', 'd!']
b.object_id.should_not == a.object_id
end
it "does not change self" do
a = ['a', 'b', 'c', 'd']
b = a.collect { |i| i + '!' }
a.should == ['a', 'b', 'c', 'd']
end
it "returns the evaluated value of block if it broke in the block" do
a = ['a', 'b', 'c', 'd']
b = a.collect {|i|
if i == 'c'
break 0
else
i + '!'
end
}
b.should == 0
end
end
describe "Array#collect!" do
it "replaces each element with the value returned by block" do
a = [7, 9, 3, 5]
a.collect! { |i| i - 1 }.should equal(a)
a.should == [6, 8, 2, 4]
end
it "returns self" do
a = [1, 2, 3, 4, 5]
b = a.collect! {|i| i+1 }
a.object_id.should == b.object_id
end
it "returns the evaluated value of block but its contents is partially modified, if it broke in the block" do
a = ['a', 'b', 'c', 'd']
b = a.collect! {|i|
if i == 'c'
break 0
else
i + '!'
end
}
b.should == 0
a.should == ['a!', 'b!', 'c', 'd']
end
end
Version data entries
31 entries across 31 versions & 1 rubygems