大约有 6,261 项符合查询结果（耗时：0.0276秒） [XML]
What is choice_set in this Django app tutorial?
...rom Question too, automatically generating a field on each instance called foo_set where Foo is the model with a ForeignKey field to that model.
choice_set is a RelatedManager which can create querysets of Choice objects which relate to the Question instance, e.g. q.choice_set.all()
If you don't l...
Callback after all asynchronous forEach callbacks are completed
... with this when i need to execute forEach with asynchronous tasks inside.
foo = [a,b,c,d];
waiting = foo.length;
foo.forEach(function(entry){
doAsynchronousFunction(entry,finish) //call finish after each entry
}
function finish(){
waiting--;
if (waiting==0) {
//do your J...
Why is “import *” bad?
...hat.
Also, it has a concrete possibility of hiding bugs.
import os, sys, foo, sqlalchemy, mystuff
from bar import *
Now, if the bar module has any of the "os", "mystuff", etc... attributes, they will override the explicitly imported ones, and possibly point to very different things. Defining __a...
Begin, Rescue and Ensure in Ruby?
...finitions are implicitly also exception blocks, so instead of writing
def foo
begin
# ...
rescue
# ...
end
end
you write just
def foo
# ...
rescue
# ...
end
or
def foo
# ...
ensure
# ...
end
The same applies to class definitions and module definitions.
However, in the...
Check if a temporary table exists and delete if it exists before creating a temporary table
...blem.
The following works fine for me in SQL Server 2005, with the extra "foo" column appearing in the second select result:
IF OBJECT_ID('tempdb..#Results') IS NOT NULL DROP TABLE #Results
GO
CREATE TABLE #Results ( Company CHAR(3), StepId TINYINT, FieldId TINYINT )
GO
select company, stepid, fie...
Import package.* vs import package.SpecificType [duplicate]
...tually a very bad problem.
Suppose you write
import a.*;
import b.*;
...
Foo f;
and class Foo exists in package a.
Now you check in your perfectly compiling code, and six months later, someone adds class Foo to package b. (Perhaps it's a third party lib that added classes in the latest version)...
Check if object is a jQuery object
...nstructor functions are to be called with the new prefix.
When you call $(foo), internally jQuery translates this to new jQuery(foo)1. JavaScript proceeds to initialize this inside the constructor function to point to a new instance of jQuery, setting it's properties to those found on jQuery.protot...
super() raises “TypeError: must be type, not classobj” for new-style class
...he old-style classes which doesn't inherit from 'object'
class A:
def foo(self):
return "Hi there"
class B(A):
def foo(self, name):
return A.foo(self) + name
share
|
impro...
Comment Inheritance for C# (actually any language)
...
You can always use the <inheritdoc /> tag:
public class Foo : IFoo
{
/// <inheritdoc />
public void Foo() { ... }
/// <inheritdoc />
public void Bar() { ... }
/// <inheritdoc />
public void Snafu() { ... }
}
Using the cref attribute, you ...
How do you get the Git repository's name in some Git repository?
...the sed command to also work when the origin url does not end in .git? so 'foo.git' becomes 'foo', but 'foo' is also matched? I guess we need non-greedy matching?
– Arnout Engelen
Nov 13 '15 at 16:38
...