大约有 21,000 项符合查询结果（耗时：0.0526秒） [XML]
How can I check if an element exists in the visible DOM?
...w do you test an element for existence without the use of the getElementById method?
25 Answers
...
Should MySQL have its timezone set to UTC?
...ion` tzt
INNER JOIN mysql.`time_zone_transition_type` tztt USING(Time_zone_id, Transition_type_id)
INNER JOIN mysql.`time_zone_name` tzn USING(Time_zone_id)
-- WHERE tzn.Name LIKE 'Europe/Moscow' -- Moscow has weird DST changes
ORDER BY tzt.Transition_time ASC
CONVERT_TZ also applies any necessary...
How can I see the SQL that will be generated by a given ActiveRecord query in Ruby on Rails
...ion statement just by putting ".to_sql" at the end. This question also provides that answer: stackoverflow.com/questions/3814738/…
– Steve Midgley
Sep 17 '14 at 5:03
...
What does principal end of an association means in 1:1 relationship in Entity framework
...use:
public class Boo
{
[Key, ForeignKey("Foo")]
public string BooId{get;set;}
public Foo Foo{get;set;}
}
Or fluent mapping
modelBuilder.Entity<Foo>()
.HasOptional(f => f.Boo)
.WithRequired(s => s.Foo);
...
how to replicate pinterest.com's absolute div stacking layout [closed]
... would like the results sorted left to right. Any direction you could provide to make it myself would be greatly appreciated.
...
Injecting $scope into an angular service function()
...ing with the server.
var save = function (student) {
if (student.id === null) {
students.push(student);
} else {
for (var i = 0; i < students.length; i++) {
if (students[i].id === student.id) {
students[i] = student;
break;
...
SQLiteDatabase.query method
... null, null, orderBy);
// since we have a named column we can do
int idx = c.getColumnIndex("max");
is equivalent to the following raw query
String queryString =
"SELECT column1, (SELECT max(column1) FROM table1) AS max FROM table1 " +
"WHERE column1 = ? OR column1 = ? ORDER BY colu...
cartesian product in pandas
...e cartesian product on.
My use case was that I needed a list of all store IDs on for each week in my list. So, I created a list of all the weeks I wanted to have, then a list of all the store IDs I wanted to map them against.
The merge I chose left, but would be semantically the same as inner in t...
How to reduce iOS AVPlayer start delay
...ets are local on the device -- no network streaming is taking place. The videos contain audio tracks.
6 Answers
...
Strangest language feature
...
In JavaScript, the following construct
return
{
id : 1234,
title : 'Tony the Pony'
};
returns undefined is a syntax error due to the sneaky implicit semicolon insertion on the newline after return. The following works as you would expect though:
return {
id : 12...