大约有 12,000 项符合查询结果（耗时：0.0441秒） [XML]
Why does C++ need a separate header file?
... no concern for building separately, then you could do that by just having foo_interface.h include foo_implementation.h.
– Steve Jessop
Mar 19 '15 at 9:02
...
How dangerous is it to access an array out of bounds?
...sting is that hyper-modern compilers may decide that if code tries to read foo[0] through foo[len-1] after having previously used a check of len against the array length to either execute or skip a piece of code, the compiler should feel free to run that other code unconditionally even if the applic...
How does the Java 'for each' loop work?
...not implement Iterable so you can't for(String s : (Iterator<String>)foo). I understand why this is, but it is irritating.
– Christopher Schultz
Oct 18 '19 at 20:21
...
Can we define implicit conversions of enums in c#?
... }
public static class MyEnumExt
{
public static int Value(this MyEnum foo) { return (int)foo; }
static void Main()
{
MyEnum val = MyEnum.A;
int i = val.Value();
}
}
This doesn't give you a lot, though (compared to just doing an explicit cast).
One of the main time...
Why use symbols as hash keys in Ruby?
...troduced a simplified syntax just for hash with symbols keys (e.g. h.merge(foo: 42, bar: 6)), and Ruby 2.0 has keyword arguments that work only for symbol keys.
Notes:
1) You might be surprised to learn that Ruby treats String keys differently than any other type. Indeed:
s = "foo"
h = {}
h[s] = ...
How can I know which parts in the code are never used?
...sis using the AST of the entire program is the way to get it. (Preventing foo() from being marked as "called" when it appears only in if (0) { foo(); } would be a bonus but requires extra smarts.)
– j_random_hacker
Jan 27 '11 at 10:11
...
Most efficient way of making an if-elif-elif-else statement when the else is done the most?
...ss
... elif something == 'there': pass
... else: pass
... """, "something='foo'", number=10000000)
1.728302001953125
Pypy:
matt$ pypy
Python 2.7.3 (daf4a1b651e0, Dec 07 2012, 23:00:16)
[PyPy 2.0.0-beta1 with GCC 4.2.1] on darwin
Type "help", "copyright", "credits" or "license" for more informatio...
How to overload std::swap()
...this issue I really don't like the method you advocate because if I define Foo and swap that way someone else who uses my code is likely to use std::swap(a, b) rather than swap(a, b) on Foo, which silently uses the inefficient default version.
– voltrevo
Dec 8 ...
How does HashSet compare elements for equality?
...sidered equal"). This is almost never implemented on the type itself (i.e. Foo doesn't implement IEqualityComparer<Foo>) but in a separate type which is only used for comparisons.
Implement equality in the type itself, by overriding GetHashCode and Equals(object). Ideally, implement IEquatable...
How do I control how Emacs makes backup files?
Emacs puts backup files named foo~ everywhere and I don't like having to remember to delete them. Also, if I edit a file that has a hard link somewhere else in the file system, the hard link points to the backup when I'm done editing, and that's confusing and awful. How can I either eliminate th...