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What exactly is metaprogramming?

...s that altered themselves at runtime were necessary and very commonplace. From Paul Graham's essay "What Made Lisp Different": Many languages have something called a macro. But Lisp macros are unique. And believe it or not, what they do is related to the parentheses. The designers of Li...
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A field initializer cannot reference the nonstatic field, method, or property

...efaultReminder = reminder.TimeSpanText[TimeSpan.FromMinutes(15)]; You cannot use an instance variable to initialize another instance variable. Why? Because the compiler can rearrange these - there is no guarantee that reminder will be initialized before defaultReminder, ...
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Performance difference for control structures 'for' and 'foreach' in C#

...xer-code (array-style accessing) is a lot worse than using the IEnumerator from the foreach, for large lists. When you access element 10.000 in a LinkedList using the indexer syntax: list[10000], the linked list will start at the head node, and traverse the Next-pointer ten thousand times, until it...
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Javascript regex returning true.. then false.. then true.. etc [duplicate]

...onfuse and cause weird errors. Welcome to JavaScript!) You can omit the g from your RegExp, since you're only testing for one match. Also, I don't think you want [^-_] at the front and back. That will allow any character at each end, ie. *plop! would be valid. You're probably thinking of lookahead...
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how to convert milliseconds to date format in android?

... // Extract the date-only value (a `LocalDate` object) from the `ZonedDateTime` object, without time-of-day and without time zone. .format( // Generate a string to textually represent the date value. DateTimeFormatter.ofPattern(...
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const vs constexpr on variables

...s you should have mentioned that the text in your answer is taken verbatim from "Programming: Principles and Practice Using C++" by Stroustrup – Aky May 16 '16 at 21:14 ...
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How can I configure Logback to log different levels for a logger to different destinations?

... This is the best filtering solution to separate trace debug info from warn and error – kheraud Apr 20 '16 at 13:12 ...
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Do I encode ampersands in ?

...t will remain possible to escape ampersands in attribute values, but apart from validation with current tools, there is no practical need to escape them in href values (and there is a small risk of making mistakes if you start escaping them). ...
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Java Date vs Calendar

... Most recent comment on the mailing list is from July and by Stephen, so the project is probably still ticking away – oxbow_lakes Sep 10 '09 at 10:11 ...
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The Concept of 'Hold space' and 'Pattern space' in sed

...ll, let's see what the command does. $ echo {a..d} | tr ' ' '\n' # Prints from 'a' to 'd' in each line a b c d $ echo {a..d} | tr ' ' '\n' | sed -n '1!G;h;$p' d c b a It reverses the input like tac command does. sed reads line-by-line, so let's see what happens on the patten space and the hold s...