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How do I check if a C++ std::string starts with a certain string, and convert a substring to an int?
...e misread this to mean "search backwards through the whole string looking for the prefix". That would give the wrong result (e.g. string("tititito").rfind("titi") returns 2 so when compared against == 0 would return false) and it would be inefficient (looking through the whole string instead of just...
Are booleans as method arguments unacceptable? [closed]
...ant to represent a "yes/no", then use a boolean, it should be self-explanatory.
But if it's a choice between two options, neither of which is clearly yes or no, then an enum can sometimes be more readable.
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Necessary to add link tag for favicon.ico?
...ct the favicon.ico automatically? Is there any reason to add the link tag for favicon.ico?
5 Answers
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SQLAlchemy: cascade delete
...s cascade options because I cannot get a simple cascade delete to operate correctly -- if a parent element is a deleted, the children persist, with null foreign keys.
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Swapping two variable value without using third variable
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Using the xor swap algorithm
void xorSwap (int* x, int* y) {
if (x != y) { //ensure that memory locations are different
*x ^= *y;
*y ^= *x;
*x ^= *y;
}
}
Why the test?
The test is to ensure that x and...
C++ include and import difference
What is the difference between #include and #import in C++?
5 Answers
5
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Weird “[]” after Java method signature
... an int[].
Java Language Specification (8.4 Method Declarations)
For compatibility with older versions of the Java platform, a declaration form
for a method that returns an array is allowed to place (some or all of) the empty
bracket pairs that form the declaration of the array type aft...
Docker and securing passwords
...play around with and one thing that keeps nagging me has been putting passwords in a Dockerfile. I'm a developer so storing passwords in source feels like a punch in the face. Should this even be a concern? Are there any good conventions on how to handle passwords in Dockerfiles?
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Logger slf4j advantages of formatting with {} instead of string concatenation
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It is about string concatenation performance. It's potentially significant if your have dense logging statements.
(Prior to SLF4J 1.7) But only two parameters are possible
Because the vast majority of logging statements have 2 or fewer parameters, so SLF4J...
When do you use map vs flatMap in RxJava?
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map transform one event to another.
flatMap transform one event to zero or more event. (this is taken from IntroToRx)
As you want to transform your json to an object, using map should be enough.
Dealing with the FileNotFoundException...