大约有 12,000 项符合查询结果（耗时：0.0367秒） [XML]
Advantages of std::for_each over for loop
...his
for(auto it = collection.begin(); it != collection.end() ; ++it)
{
foo(*it);
}
Or this
for_each(collection.begin(), collection.end(), [](Element& e)
{
foo(e);
});
when the range-based for loop syntax is available:
for(Element& e : collection)
{
foo(e);
}
This kind of sy...
'too many values to unpack', iterating over a dict. key=>string, value=>list
...lues in fields.iteritems():
... print field, values
...
first_names ['foo', 'bar']
last_name ['gravy', 'snowman']
Your problem was that you were looping over fields, which returns the keys of the dictionary.
>>> for field in fields:
... print field
...
first_names
last_name
...
from jquery $.ajax to angular $http
...rl: "http://example.appspot.com/rest/app",
method: "POST",
data: {"foo":"bar"}
}).then(function successCallback(response) {
// this callback will be called asynchronously
// when the response is available
$scope.data = response.data;
}, function errorCallback(resp...
How can I replace a newline (\n) using sed?
.../' file # to delete newlines from each line
sed 's/\n/foo\n/' file # to add a word to the end of each line
will NEVER work, because the trailing newline is removed before
the line is put into the pattern space. To perform the above tasks,
use one of these scripts inst...
What is the purpose of the var keyword and when should I use it (or omit it)?
...l scope (at which point it will create it):
// These are both globals
var foo = 1;
bar = 2;
function()
{
var foo = 1; // Local
bar = 2; // Global
// Execute an anonymous function
(function()
{
var wibble = 1; // Local
foo = 2; // Inherits from scope above (...
When is a function too long? [closed]
...er of times I've stumbled across someone's code with a line like: // fetch Foo's credentials where Bar is "uncomplete". That's almost certainly a function name right there and should be decoupled. Probably wants to be refactored into something like: Foo.fetchCredentialWhereBarUncomplete()
...
Is there an advantage to use a Synchronized Method instead of a Synchronized Block?
...thod). For example, these are semantically equivalent:
synchronized void foo() {
...
}
void foo() {
synchronized (this) {
...
}
}
The latter is more flexible since it can compete for the associated lock of any object, often a member variable. It's also more granular because you...
How default .equals and .hashCode will work for my classes?
...wełDyda: The default behavior is generally correct for mutable types. If Foo and Bar are references to two different instances of a mutable type, and there exists a method (e.g. SomeMutatingMethod) such that Foo.SomeMutatingMethod() does not affect Bar the same way it does Foo, that difference sho...
Can I set variables to undefined or pass undefined as an argument?
...
@Hortitude: That's point (4). I generally wouldn't typeof foo=='undefined'; it tends to be used for (4a) global-sniffing, in which case I'd prefer to be explicit and say 'foo' in window, or (4b) testing against the undefined-value itself, in which case I'd prefer to be readable and ...
What is the syntax to insert one list into another list in python?
...
foo = [1, 2, 3]
bar = [4, 5, 6]
foo.append(bar) --> [1, 2, 3, [4, 5, 6]]
foo.extend(bar) --> [1, 2, 3, 4, 5, 6]
http://docs.python.org/tutorial/datastructures.html
...