大约有 12,000 项符合查询结果（耗时：0.0313秒） [XML]
How to use range-based for() loop with std::map?
... called structured bindings, which allows for the following:
std::map< foo, bar > testing = { /*...blah...*/ };
for ( const auto& [ k, v ] : testing )
{
std::cout << k << "=" << v << "\n";
}
...
Release generating .pdb files, why?
... you can force it to load by specifying the /i option like this .reload /i foo.dll. That will load foo.pdb even if foo.pdb was created after releasing foo.dll.
– Marc Sherman
Nov 29 '12 at 14:20
...
JavaScript plus sign in front of function expression
... functions that are invoked immediately, e.g.:
+function() { console.log("Foo!"); }();
Without the + there, if the parser is in a state where it's expecting a statement (which can be an expression or several non-expression statements), the word function looks like the beginning of a function decl...
What's the point of g++ -Wreorder?
...
This can bite you if your initializers have side effects. Consider:
int foo() {
puts("foo");
return 1;
}
int bar() {
puts("bar");
return 2;
}
struct baz {
int x, y;
baz() : y(foo()), x(bar()) {}
};
The above will print "bar" then "foo", even though intuitively one woul...
Get fully qualified class name of an object in Python
...
With the following program
#! /usr/bin/env python
import foo
def fullname(o):
# o.__module__ + "." + o.__class__.__qualname__ is an example in
# this context of H.L. Mencken's "neat, plausible, and wrong."
# Python makes no guarantees as to whether the __module__ special
#...
Tuples( or arrays ) as Dictionary keys in C#
...ht reference comarison...try: bool test = new Tuple<int, string>(1, "foo").Equals(new Tuple<int, string>(1, "Foo".ToLower()));
– Mike Marynowski
Aug 5 '13 at 5:09
...
Can I find events bound on an element with jQuery?
...is an internal-use only method:
// Bind up a couple of event handlers
$("#foo").on({
click: function(){ alert("Hello") },
mouseout: function(){ alert("World") }
});
// Lookup events for this particular Element
$._data( $("#foo")[0], "events" );
The result from $._data will be an object t...
Object-orientation in C
...;super.vtable = &derived1_vtable;
/* init base members d->super.foo */
/* init derived1 members d->foo */
}
struct derived2
{
struct base super;
/* derived2 members */
};
void derived2_dance(struct derived2 *d)
{
/* implementation of derived2's dance function */
}
vo...
How do I trim whitespace?
...
For leading and trailing whitespace:
s = ' foo \t '
print s.strip() # prints "foo"
Otherwise, a regular expression works:
import re
pat = re.compile(r'\s+')
s = ' \t foo \t bar \t '
print pat.sub('', s) # prints "foobar"
...
Collections.emptyList() vs. new instance
...5.0 you can specify the type of element in the container:
Collections.<Foo>emptyList()
I concur with the other responses that for cases where you want to return an empty list that stays empty, you should use this approach.
...