21 Matching Annotations
  1. Apr 2022
    1. Caution: + continues the statement but not the string. puts "foo"+"bar".upcase gives you fooBAR, whereas puts ("foo"+"bar").upcase gives you FOOBAR. (Whether or not there's a newline after the +.) But: if you use a backslash instead of the plus sign, it will always give you FOOBAR, because combining lines into one statement, and then combining successive strings into one string, happen before the string method gets called.
    1. If I create a model ActiveRecord sends NULL values for every field that is not defined. Postgres dutifully writes the NULL value into the field instead of the default value. Activerecord should either send nothing (preferable) or send DEFAULT.
  2. Mar 2022
    1. Use apt as a first choice, but if you're scripting use apt-get. Apt-get has more stable output (meaning that the output format is left alone as much as possible so as not to break scripts which parse that output automatically). Apt-get also has some low-level commands not available in apt.
  3. Feb 2022
    1. "Context" manipulation is one of big topic and there are many related terminologies (academic, language/implementation specific, promotion terminologies). In fact, there is confusing. In few minutes I remember the following related words and it is good CS exam to describe each :p Thread (Ruby) Green thread (CS terminology) Native thread (CS terminology) Non-preemptive thread (CS terminology) Preemptive thread (CS terminology) Fiber (Ruby/using resume/yield) Fiber (Ruby/using transfer) Fiber (Win32API) Generator (Python/JavaScript) Generator (Ruby) Continuation (CS terminology/Ruby, Scheme, ...) Partial continuation (CS terminology/ functional lang.) Exception handling (many languages) Coroutine (CS terminology/ALGOL) Semi-coroutine (CS terminology) Process (Unix/Ruby) Process (Erlang/Elixir) setjmp/longjmp (C) makecontext/swapcontext (POSIX) Task (...)
  4. Sep 2021
  5. Apr 2021
    1. Requirement #2 contains an unwarranted assumption. The body needs to flow not around the sidebar, but around the sidebar's position. That may seem like splitting hairs, but it isn't -- because what if there were something floated where we want to put the sidebar? The body would flow around that space. If we could put the sidebar in that same location, we'd have a solution.
    1. In my opinion, the W3C definition is unnecessarily confusing and restrictive. The dictionary definition of aside is "a temporary departure from a main theme or topic", and the spec should just stick to that, rather than introducing subtle distinctions.
    2. I believe the accepted answer is not quite correct. According to the HTML5 working draft, the <aside> element can be used to mark up side notes in certain, but not all cases:
  6. Mar 2021
    1. The distinction in computer programming between classes and objects is related, though in this context, "class" sometimes refers to a set of objects (with class-level attribute or operations) rather than a description of an object in the set, as "type" would.
    1. The "Pluridisciplinary" or "multidisciplinarity" level The genuine cross-disciplinary level: "interdisciplinarity" The discipline-forming level "transdisciplinarity"
  7. Feb 2021
    1. The term encapsulation is often used interchangeably with information hiding. Not all agree on the distinctions between the two though; one may think of information hiding as being the principle and encapsulation being the technique. A software module hides information by encapsulating the information into a module or other construct which presents an interface.
    1. Remix occurs when the original meme is altered in some way, while mimicry occurs when the meme is recreated in a different fashion to the original.

      I don't even understand the difference (yet)

  8. Dec 2020
  9. Nov 2020