大约有 32,000 项符合查询结果（耗时：0.0562秒） [XML]
SQL order string as number
...olumn to a number if you only store numbers anyway.
If you can't do that then cast your column value to an integer explicitly with
select col from yourtable
order by cast(col as unsigned)
or implicitly for instance with a mathematical operation which forces a conversion to number
select col f...
java.net.SocketException: Connection reset
... various reasons for that.
The simplest is when you close the socket, and then write more data on the output stream. By closing the socket, you told your peer that you are done talking, and it can forget about your connection. When you send more data on that stream anyway, the peer rejects it with ...
ActiveRecord: size vs count
...n your needs.
Basically:
if you already load all entries, say User.all, then you should use length to avoid another db query
if you haven't anything loaded, use count to make a count query on your db
if you don't want to bother with these considerations, use size which will adapt
...
How to check if a char is equal to an empty space?
...
If you mean the ASCII / Latin-1 / Unicode space character (0x20) aka SP, then:
if (ch == ' ') {
// ...
}
If you mean any of the traditional ASCII whitespace characters (SP, HT, VT, CR, NL), then:
if (ch == ' ' || ch == '\t' || ch == '\r' || ch == '\n' || ch == '\x0b') {
// ...
}
If you...
How to use Morgan logger?
...og4j (if you know java) where we instantiate a Logger and say log 'this'.
Then I dug in morgan code, turns out it is not that type of a logger, it is for automated logging of requests, responses and related data. When added as a middleware to an express/connect app, by default it should log stateme...
Python timedelta in years
...n integer number of years, you can guess based on 365.25 days per year and then check using either of the yearsago functions defined above::
def num_years(begin, end=None):
if end is None:
end = datetime.now()
num_years = int((end - begin).days / 365.25)
if begin > yearsago(n...
Copy existing project with a new name in Android Studio
... clicked Refactor -> Rename, I got errors with "package rename" option, then I did "folder rename" option with success.
– Ismail Yavuz
May 23 '19 at 2:30
...
svn: replace trunk with branch
...cked out two copies. In the first copy I moved dir A to A2 and dir B to A. Then moved A to B, then A2 to A. (rename and rename back.) In the 2nd checkout, I made a change to a file and tried to svn update. It conflicted because the file I changed "was deleted". Internally it doesn't save duplicate ...
How can I build XML in C#?
...ET 3.5, XDocument, etc. are also very friendly. If the size is very large, then XmlWriter is your friend.
For an XDocument example:
Console.WriteLine(
new XElement("Foo",
new XAttribute("Bar", "some & value"),
new XElement("Nested", "data")));
Or the same with XmlDocument...
Can anybody push to my project on github?
...n push to your own repo, it's because you are using one of the supported authentification methods (HTTPS, SSH, ...).
If you want to grant someone else privileges to push to your repo, you would need to configure that access in the project settings.
To contribute to projects in which you don't have...