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How many GCC optimization levels are there?
...ze debugging experience. -Og enables optimizations that do not interfere with debugging. It should be the
optimization level of choice for the standard edit-compile-debug cycle, offering a reasonable level of optimization
while maintaining fast compilation and a good debugging experie...
ARC and bridged cast
With ARC, I can no longer cast CGColorRef to id . I learned that I need to do a bridged cast. According clang docs :
3 ...
String concatenation: concat() vs “+” operator
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No, not quite.
Firstly, there's a slight difference in semantics. If a is null, then a.concat(b) throws a NullPointerException but a+=b will treat the original value of a as if it were null. Furthermore, the concat() method only accep...
Unable to find a locale path to store translations for file __init__.py
I'm trying to translate a Django app. I created some strings with {% trans %} in my templates. However, when I execute the following command in my app folder, I receive an error message:
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What do *args and **kwargs mean? [duplicate]
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Putting *args and/or **kwargs as the last items in your function definition’s argument list allows that function to accept an arbitrary number of arguments and/or keyword arguments.
For example, if you wanted to write a function that returned the sum of all its ar...
Hash Map in Python
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edited Oct 23 '19 at 9:23
Reinout van Rees
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Iterate two Lists or Arrays with one ForEach statement in C#
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This is known as a Zip operation and will be supported in .NET 4.
With that, you would be able to write something like:
var numbers = new [] { 1, 2, 3, 4 };
var words = new [] { "one", "two", "three", "four" };
var numbersAndWords = numbers.Zip(words, (n, w) => new { Number = n, Word = ...
Most efficient way to determine if a Lua table is empty (contains no entries)?
...icient way to determine if a table is empty (that is, currently contains neither array-style values nor dict-style values)?
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Using OR in SQLAlchemy
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@intgr My experience with Oracle shows that a sequence of "OR"s is way faster than using "IN". Also "IN" is limited to a set of ~1000 entries, while "OR" is not.
– g.a
Sep 5 '18 at 21:13
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Convert all first letter to upper case, rest lower for each word
...OW";
s = System.Threading.Thread.CurrentThread.CurrentCulture.TextInfo.ToTitleCase(s.ToLower());
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