大约有 40,000 项符合查询结果（耗时：0.0443秒） [XML]
What is this Javascript “require”?
...ich points at this directory. i.e if your node_modules directory is in the root of the project at the same level as your index.html you would write this in your index.html:
<script src="node_modules/ng"></script>
That whole script will now be loaded into the page - so you can access i...
What does this symbol mean in IntelliJ? (red circle on bottom-left corner of file name, with 'J' in
...
Thanks, it worked. I added root pom as maven project, and it changed all my child modules automatically. Great..
– Rohit Kumar
Aug 16 '19 at 15:37
...
When to use reinterpret_cast?
...ions to (IEEE 754) floats. One example of this was the Fast Inverse Square-Root trick:
https://en.wikipedia.org/wiki/Fast_inverse_square_root#Overview_of_the_code
It treats the binary representation of the float as an integer, shifts it right and subtracts it from a constant, thereby halving and n...
How to create a new (and empty!) “root” branch?
I would like to define a new "root" branch in this git repository. By "root" branch I mean a branch that is entirely independent of all the other branches in the repository 1 .
...
ORDER BY the IN value list
...
Just because it is so difficult to find and it has to be spread: in mySQL this can be done much simpler, but I don't know if it works in other SQL.
SELECT * FROM `comments`
WHERE `comments`.`id` IN ('12','5','3','17')
ORDER BY FIELD(`comments`.`id`,'12','5','3','17')
...
Update all values of a column to lowercase
...
See http://dev.mysql.com/doc/refman/5.0/en/string-functions.html#function_lower
UPDATE table_name SET tag = LOWER(tag)
share
|
improve t...
No @XmlRootElement generated by JAXB
...nted at, the rules by which JAXB XJC decides whether or not to put the @XmlRootElement annotation on a generated class are non trivial (see this article).
@XmlRootElement exists because the JAXB runtime requires certain information in order to marshal/unmarshal a given object, specifically the XML ...
Subqueries vs joins
...
Here's an example of how subqueries are evaluated in MySQL 6.0.
The new optimizer will convert this kind of subqueries into joins.
share
|
improve this answer
|
...
Get generated id after insert
...
I had quite a bit of problems with this on mySQL, the LAST_INSERT_ID is not reliable way to get the ID, if you have users hammering the database, the ID returned may not be the ID that was inserted by the query you have run, several other users might impact on the ret...
How can I generate an MD5 hash?
...en how do u convert this thedigest to a string so that we can insert it in mysql ?
– Humphrey
Nov 8 '17 at 8:39
3
...