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Why use the yield keyword, when I could just use an ordinary IEnumerable?
...azy. Only, it requires far less compiler generated custom ---gunk--- code. And less developer time writing and maintaining. (Of course, that was just this example)
– sehe
Dec 28 '12 at 11:57
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`levels
...answers here are good, but they are missing an important point. Let me try and describe it.
R is a functional language and does not like to mutate its objects. But it does allow assignment statements, using replacement functions:
levels(x) <- y
is equivalent to
x <- `levels<-`(x, y)
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Why are C character literals ints instead of chars?
...ar) == 1 . This makes intuitive sense, since 'a' is a character literal, and sizeof(char) == 1 as defined by the standard.
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How to convert a number to string and vice versa in C++
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Update for C++11
As of the C++11 standard, string-to-number conversion and vice-versa are built in into the standard library. All the following functions are present in <string> (as per paragraph 21.5).
string to numeric
float stof(const s...
No grammar constraints (DTD or XML schema) detected for the document
... for the "No grammar specified" preference. You may need to close the file and then reopen it to make the warning go away.
(I know this question is old but it was the first one I found when searching on the warning, so I'm posting the answer here for other searchers.)
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Switch statement fallthrough in C#?
... Damn - I've been programming with C# since the early days of 1.0, and I've never seen this until now. Just goes to show, you learn new things every day.
– Erik Forbes
Feb 5 '09 at 3:30
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displayname attribute vs display attribute
What is difference between DisplayName attribute and Display attribute in ASP.NET MVC?
4 Answers
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How to do the equivalent of pass by reference for primitives in Java
...lass member variable.
Choice 4: Create a single element array of type int and pass that
This is considered a hack, but is sometimes employed to return values from inline class invocations.
void play(int [] toyNumber){
System.out.println("Toy number in play " + toyNumber[0]);
toyNumbe...
Java Replacing multiple different substring in a string at once (or in the most efficient way)
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Future reader : for regex, "(" and ")" will enclose the group to search. The "%" counts as a literal in the text. If your terms don't start AND end with the "%" they will not be found. So adjust prefixes and suffixes on both parts (text + code).
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Header files for x86 SIMD intrinsics
...d normally just include <immintrin.h>. It includes everything.
GCC and clang will stop you from using intrinsics for instructions you haven't enabled at compile time (e.g. with -march=native or -mavx2 -mbmi2 -mpopcnt -mfma -mcx16 -mtune=znver1 or whatever.)
MSVC and ICC will let you use int...