String#chop!, Array#concat Method such as String#chop and Array#concat is said "It has destructive action", since they change the state of the receiver, though the hardware is seldom put out of order
Something that is destructive causes or is capable of causing great damage, harm, or injury. the awesome destructive power of nuclear weapons + destructiveness de·struc·tive·ness the size of armies and the destructiveness of their weapons. + destructively de·struc·tive·ly Power can be used creatively or destructively. causing damage to people or things destroy
adj (of an operator) capable of modifying some program-visible aspect of one or more objects that are either explicit arguments to the operator or that can be obtained directly or indirectly from the global environment by the operator
Causing destruction; tending to bring about ruin, death, or devastation; ruinous; fatal; productive of serious evil; mischievous; pernicious; often with of or to; as, intemperance is destructive of health; evil examples are destructive to the morals of youth