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Static variables in member functions
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Since class A is a non-template class and A::foo() is a non-template function. There will be only one copy of static int i inside the program.
Any instance of A object will affect the same i and lifetime of i will remain through out the program. To add an exampl...
Is a Java hashmap search really O(1)?
I've seen some interesting claims on SO re Java hashmaps and their O(1) lookup time. Can someone explain why this is so? Unless these hashmaps are vastly different from any of the hashing algorithms I was bought up on, there must always exist a dataset that contains collisions.
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Why does the MongoDB Java driver use a random number generator in a conditional?
...he following code in this commit for MongoDB's Java Connection driver , and it appears at first to be a joke of some sort. What does the following code do?
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Logger slf4j advantages of formatting with {} instead of string concatenation
...ameters since API version 1.7.
For those cases where you need more than 2 and you're stuck with pre-1.7 SLF4J, then just use either string concatenation or new Object[] { param1, param2, param3, ... }. There should be few enough of them that the performance is not as important.
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Maximum value for long integer
...t; type(sys.maxsize+1)
<type 'long'>
for integers we have
maxint and maxsize:
The maximum value of an int can be found in Python 2.x with sys.maxint. It was removed in Python 3, but sys.maxsize can often be used instead. From the changelog:
The sys.maxint constant was removed, since t...
Staging Deleted files
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matching files. Also a leading directory name (e.g. dir to add dir/file1 and dir/file2) can be given to update the index to match the current state of the directory as a whole (e.g. specifying dir will record not just a file dir/file1 modified in the working tree, a file dir/file2 added to the wor...
Does python have an equivalent to Java Class.forName()?
I have the need to take a string argument and create an object of the class named in that string in Python. In Java, I would use Class.forName().newInstance() . Is there an equivalent in Python?
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Effective way to find any file's Encoding
Yes is a most frequent question, and this matter is vague for me and since I don't know much about it.
9 Answers
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How can I display a JavaScript object?
...ma in the log method, then the first line of the output will be the string and after that the object will be rendered:
console.log('My object: ', obj);
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What does default(object); do in C#?
... worth making it explicit)
The biggest use of default(T) is in generics, and things like the Try... pattern:
bool TryGetValue(out T value) {
if(NoDataIsAvailable) {
value = default(T); // because I have to set it to *something*
return false;
}
value = GetData();
re...