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Why start an ArrayList with an initial capacity?
...aranteed to run in O(1).
1000000 + 1000000 = 2000000 operations
Java vs C#
Java is as above, starting at 10 and increasing each resize at 50% + 1. C# starts at 4 and increases much more aggressively, doubling at each resize. The 1000000 adds example from above for C# uses 3097084 operations.
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Set a default parameter value for a JavaScript function
...ned. Plus that way you'd get a reference error if you misspelled undefined vs. putting it in a string.
– Abe Voelker
May 21 '15 at 22:04
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How do I get the path of the current executed file in Python?
...e not so small... might be a load immediate or something even faster for 0 vs a load global for _?) Debatable whether it's cleaner or easier to read or even more clever/obscure.
– ArtOfWarfare
Dec 22 '17 at 22:19
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Purpose of Trigraph sequences in C++?
...rt (IBM's for example). Microsoft started supporting a warning (C4837) in VS2008 that must be explicitly enabled (using -Wall or something).
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What is the difference between String.slice and String.substring?
...erence between substring and slice in Firefox 22. jsperf.com/string-slice-vs-substring
– Rick
Jul 17 '13 at 21:29
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How many double numbers are there between 0.0 and 1.0?
...s (for any "normal" floating point representation of any base and exponent vs fraction lengths) lie between 0.0 and 1.0 (another quarter between 1.0 and infinity, and the remaining half on the negative half of the real axis). Essentially, half the values of the exponent (with a normal bias, halfway...
(Built-in) way in JavaScript to check if a string is a valid number
... latest version of Chrome. See the performance test here: jsperf.com/isnan-vs-typeof/5
– Kevin Jurkowski
Jan 22 '14 at 0:59
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Check if string matches pattern
...where in string. (See also: https://docs.python.org/library/re.html#search-vs-match)
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How do you build a Singleton in Dart?
...are singleton patterns. It's really a question of syntax "new Singleton()" vs "singleton". I find the latter more clear. Dart's factory constructors are useful, but I don't think this is a good use case for them. I also think Dart's lazy initialisation is a great feature, which is underused. Also re...
Insert Update trigger how to determine if insert or update
...is both a common configuration and a specific action to occur on an INSERT vs. UPDATE trigger. In these cases, to create a separate trigger for the UPDATE and the INSERT would become maintenance problem. (i.e. were both triggers updated properly for the necessary common data algorithm fix?)
To th...