大约有 7,000 项符合查询结果（耗时：0.0177秒） [XML]
Why do you use typedef when declaring an enum in C++?
...02000000
};
you'll have to use it doing something like :
enum TokenType foo;
But if you do this :
typedef enum e_TokenType
{
blah1 = 0x00000000,
blah2 = 0X01000000,
blah3 = 0X02000000
} TokenType;
You'll be able to declare :
TokenType foo;
But in C++, you can use only th...
What is the difference between server side cookie and client side cookie?
...swer from the server:
HTTP/1.1 200 OK
Content-type: text/html
Set-Cookie: foo=10
Set-Cookie: bar=20; Expires=Fri, 30 Sep 2011 11:48:00 GMT
... rest of the response
Here two cookies foo=10 and bar=20 are stored on the browser. The second one will expire on 30 September.
In each subsequent reques...
Django: Why do some model fields clash with each other?
...above the apps and then import the apps e.g.
myproject/
apps/
foo_app/
bar_app/
So if you are importing apps, foo_app and bar_app then you could get this issue. I had apps, foo_app and bar_app all listed in settings.INSTALLED_APPS
And you want to avoid importing apps anyway, b...
MongoDB atomic “findOrCreate”: findOne, insert if nonexistent, but do not update
...: { _id: "some potentially existing id" },
update: {
$setOnInsert: { foo: "bar" }
},
new: true, // return new doc if one is upserted
upsert: true // insert the document if it does not exist
})
As $setOnInsert only affects documents being inserted, if an existing document is found, no...
C multi-line macro: do/while(0) vs scope block [duplicate]
...ll contexts.
Consider the following code sketch
if (<condition>)
foo(a);
else
bar(a);
where 'foo' and 'bar' are ordinary functions. Now imagine that you'd
like to replace function 'foo' with a macro of the above nature
if (<condition>)
CALL_FUNCS(a);
else
bar(a);
Now, if y...
Converting an array to a function arguments list [duplicate]
...that works, why won't this work? document.body.setAttribute.apply( this, ["foo", "bar"] ); I need to send variable arguments to various object methods with different argument requirements. Quick edit: Apparently this has to be document.body, or whatever the parent is
– bryc
...
Ruby ampersand colon shortcut [duplicate]
.... The colon in this case is for the symbol. So, there's & and there's :foo.
The & calls to_proc on the object, and passes it as a block to the method. In Rails, to_proc is implemented on Symbol, so that these two calls are equivalent:
something {|i| i.foo }
something(&:foo)
Also, to_pro...
Run jar file in command prompt [duplicate]
...f you dont have an entry point defined in your manifest invoking java -jar foo.jar will not work.
Use this command if you dont have a manifest or to run a different main class than the one specified in the manifest:
java -cp foo.jar full.package.name.ClassName
See also instructions on how to cre...
How to assign multiple classes to an HTML container? [closed]
...on order. The names in the class attribute have no specified order, since .foo is syntactic sugar for [class ~= foo] ref, "foo is a word in the class attribute".
– Ulrich Schwarz
Jan 13 '14 at 16:50
...
Automatically creating directories with file output [duplicate]
...nction does this. Try the following:
import os
import errno
filename = "/foo/bar/baz.txt"
if not os.path.exists(os.path.dirname(filename)):
try:
os.makedirs(os.path.dirname(filename))
except OSError as exc: # Guard against race condition
if exc.errno != errno.EEXIST:
...