Given the Question and Answer pair, detect whether the answer is acceptable or not. Denote acceptable answer as "yes", otherwise denote as "no". An acceptable answer is consistent with the context in question, detailed, long, and uses general knowledge of English. Answers that are not definite and suggest a variety of options are not acceptable answers.
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Question: Question: In computer programming, when you append a "string" to another, you add it to the end of the former string. E.g. String string1 = "abcd"; String string2 = "efgh"; Appending the two strings would give "abcdefgh" But what if I wanted to add string2 before string1 to have the result: "efghabcd" What would be a good name for that that reverse operation? What is the opposite of "append"? 
Answer: Prepend, insert, pre-attach. Some programming languages have additional functions that can add strings in various positions, including the start of another string. For example: slice, push, at.

Answer: no


Question: Question: The Law of Demeter ("talk only to your friends") is a good place to start, but think about it this way: you can play with your toys, with toys that you make, and with toys that someone gives you. You don't ever, ever play with your toy's toys. Source: The Thoughtworks Anthology What could the last sentence mean? Could a toy have a toy? Assuming a toy means "A toy is an item that is used in play", a toy can never have a toy, so one cannot play with a toy's toys (it's physically not possible). The context is object oriented programming. 
Answer: As other people have said, it's a badly worded analogy, around the fact that you shouldn't directly interact with items you don't directly own (or have been given permission to interact with). A better analogy would be: you have a sandwich, and your partner has a sandwich. You can eat your sandwich if you want, but you shouldn't eat your partner's sandwich without their permission. Otherwise, there may be trouble when they get and try to eat it...

Answer: no


Question: Question: How does one correctly apply "in which", "of which", "at which", "to which", etc.? I'm confused with which one to apply when constructing sentences around these. 
Answer: The trick to knowing how to use; of which, at which, in which, to which, from which is to analyse the prepositional phrases, phrasal verbs, verbs and prepositions: He /spoke of/ war and peace and many other topics that day. The topic /of which he spoke/ was complex. The verb here that means to speak about a topic is /to speak/ of a topic/: to mention The party /at which/ he spoke/ was noisy. Phrase: A party is held /at a place/. It is implied. The situation /in which/ we found ourselves was dire. Phrase: /to find oneself /in a situation. The bonds /from which/ we broke free were tight. phrase: to /break free/ from bonds. The town /to which/we were driving was 50 ks away. phrase: to /drive/ to a place. Summary (and not a complete answer but a general one): The preposition depends on the verb that takes a preposition, a phrasal verb that includes a preposition, or it depends on the prepositional phrase used. Also, there are many other prepositions that can be paired with which: under, during, about, over, etc.

Answer:
yes