大约有 40,000 项符合查询结果（耗时：0.0724秒） [XML]
What's the best manner of implementing a social activity stream? [closed]
...
I have created such system and I took this approach:
Database table with the following columns: id, userId, type, data, time.
userId is the user who generated the activity
type is the type of the activity (i.e. Wrote blog post, added photo, commented on user's photo)
data is a seriali...
Count(*) vs Count(1) - SQL Server
...uld be evaluated as per ANSI
b) Otherwise, let TX be the single-column table that is the
result of applying the <value expression> to each row of T
and eliminating null values. If one or more null values are
eliminated, then a completion cond...
select into in mysql
...
Use the CREATE TABLE SELECT syntax.
http://dev.mysql.com/doc/refman/5.0/en/create-table-select.html
CREATE TABLE new_tbl SELECT * FROM orig_tbl;
share
|...
What is the curiously recurring template pattern (CRTP)?
...phism(which like dynamic polymorphism but without virtual function pointer table).
#pragma once
#include <iostream>
template <typename T>
class Base
{
public:
void method() {
static_cast<T*>(this)->method();
}
};
class Derived1 : public Base<...
How to remove leading and trailing whitespace in a MySQL field?
I have a table with two fields (countries and ISO codes):
11 Answers
11
...
Using arrays or std::vectors in C++, what's the performance gap?
...ong. The standard forbids exponential growth: § 23.2.3 paragraph 16 says "Table 101 lists operations that are provided for some types of sequence containers but not others. An implementation shall provide these operations for all container types shown in the “container” column, and shall implem...
How do you get centered content using Twitter Bootstrap?
...
I've tried this for both row, and span12, but my table inside span12, inside row always sits left. Adding padding moves it to the center, but I want to center it in a responsive way. Can I do auto padding somehow?
– ATSiem
Apr 19 '12 a...
Force R not to use exponential notation (e.g. e+10)?
...file auto-executes it. This is useful for e.g. default package loads, data.table configuration, environment etc. Again, that config can run to a page of settings, and there's zero chance you'll remember those and their syntax and type them in
...
jQuery document.createElement equivalent?
...is.$OuterDiv = $('<div></div>')
.hide()
.append($('<table></table>')
.attr({ cellSpacing : 0 })
.addClass("text")
)
;
Update: I thought I'd update this post since it still gets quite a bit of traffic. In the comments below there's some discussi...
Can you nest html forms?
...
Just to point the browser-support table: caniuse.com/#feat=form-attribute Resuming - it works everywhere(Chrome, Firefox, Opera, Egde, Safari, Android browser...) except IE (including latest by now v11).
– dmikam
Jul 27...