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Does the C++ standard mandate poor performance for iostreams, or am I just dealing with a poor imple
...w performance of C++ standard library iostreams, I get met with a wave of disbelief. Yet I have profiler results showing large amounts of time spent in iostream library code (full compiler optimizations), and switching from iostreams to OS-specific I/O APIs and custom buffer management does give an...
Hiding the scroll bar on an HTML page
Can CSS be used to hide the scroll bar? How would you do this?
21 Answers
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Why aren't variables declared in “try” in scope in “catch” or “finally”?
...lly, Java has just 2 levels of scope: global and function. But, try/catch is an exception (no pun intended). When an exception is thrown and the exception object gets a variable assigned to it, that object variable is only available within the "catch" section and is destroyed as soon as the catch ...
Getting a slice of keys from a map
Is there any simpler/nicer way of getting a slice of keys from a map in Go?
6 Answers
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How do I assert equality on two classes without an equals method?
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edited Jun 19 '19 at 14:11
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In Matplotlib, what does the argument mean in fig.add_subplot(111)?
Sometimes I come across code such as this:
7 Answers
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Windows batch files: .bat vs .cmd?
As I understand it, .bat is the old 16-bit naming convention, and .cmd is for 32-bit Windows, i.e., starting with NT. But I continue to see .bat files everywhere, and they seem to work exactly the same using either suffix. Assuming that my code will never need to run on anything older than NT, d...
What are the rules for calling the superclass constructor?
... with an argument, you must use the subclass's constructor initialization list. Unlike Java, C++ supports multiple inheritance (for better or worse), so the base class must be referred to by name, rather than "super()".
class SuperClass
{
public:
SuperClass(int foo)
{
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How can I check if a checkbox is checked?
...ding a mobile web app with jQuery Mobile and I want to check if a checkbox is checked. Here is my code.
14 Answers
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Java Reflection Performance
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Yes - absolutely. Looking up a class via reflection is, by magnitude, more expensive.
Quoting Java's documentation on reflection:
Because reflection involves types that are dynamically resolved, certain Java virtual machine optimizations can not be performed. Consequently...