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Contents
describe "Array#reject" do
it "returns a new array without elements for which block is true" do
ary = [1, 2, 3, 4, 5]
ary.reject { true }.should == []
ary.reject { false }.should == ary
ary.reject { false }.object_id.should_not == ary.object_id
ary.reject { nil }.should == ary
ary.reject { nil }.object_id.should_not == ary.object_id
ary.reject { |i| i < 3 }.should == [3, 4, 5]
ary.reject { |i| i % 2 == 0 }.should == [1, 3, 5]
end
it "returns self when called on an Array emptied with #shift" do
array = [1]
array.shift
array.reject { |x| true }.should == []
end
end
describe "Array#reject!" do
it "removes elements for which block is true" do
a = [3, 4, 5, 6, 7, 8, 9, 10, 11]
a.reject! { |i| i % 2 == 0 }.should equal(a)
a.should == [3, 5, 7, 9, 11]
a.reject! { |i| i > 8 }
a.should == [3, 5, 7]
a.reject! { |i| i < 4 }
a.should == [5, 7]
a.reject! { |i| i == 5 }
a.should == [7]
a.reject! { true }
a.should == []
a.reject! { true }
a.should == []
end
it "returns nil when called on an array emptied with #shift" do
array = [1]
array.shift
array.reject! { |x| true }.should == nil
end
it "returns nil if no changes are made" do
a = [1, 2, 3]
a.reject! { |i| i < 0 }.should == nil
a.reject! { true }
a.reject! { true }.should == nil
end
end
Version data entries
23 entries across 23 versions & 1 rubygems