大约有 47,000 项符合查询结果（耗时：0.0595秒） [XML]
Select last row in MySQL
...
I just ran this over 20m rows and it was very fast. I assume there's some kind of special case for handling this query. (EDIT: MySQL 5.7, InnoDB engine)
– Daniel Buckmaster
Oct 29 '18 at 2:20
...
Why does Twitter Bootstrap Use Pixels for Font Size?
...ding behind the browser zoom excuse. Really sad to see such a heavily used and influential framework completely ignore accessibility issues and a fundamental cornerstone of responsive design. They are in a position of great responsibility and unfortunately seem to have no intention of acting accordi...
What is The Rule of Three?
...antics.
This means that objects are implicitly copied in various contexts,
and we should understand what "copying an object" actually means.
Let us consider a simple example:
class person
{
std::string name;
int age;
public:
person(const std::string& name, int age) : name(name), ag...
Two way sync with rsync
I have a folder a/ and a remote folder A/.
I now run something like this on a Makefile:
10 Answers
...
Keystore type: which one to use?
...
There are a few more types than what's listed in the standard name list you've linked to. You can find more in the cryptographic providers documentation. The most common are certainly JKS (the default) and PKCS12 (for PKCS#12 files, often with extension .p12 or sometimes .pfx).
...
When should I use a struct rather than a class in C#?
When should you use struct and not class in C#? My conceptual model is that structs are used in times when the item is merely a collection of value types . A way to logically hold them all together into a cohesive whole.
...
Oracle “Partition By” Keyword
Can someone please explain what the partition by keyword does and give a simple example of it in action, as well as why one would want to use it? I have a SQL query written by someone else and I'm trying to figure out what it does.
...
What's wrong with overridable method calls in constructors?
...When the @Override is invoked, the state of the object may be inconsistent and/or incomplete.
A quote from Effective Java 2nd Edition, Item 17: Design and document for inheritance, or else prohibit it:
There are a few more restrictions that a class must obey to allow inheritance. Constructors m...
Bash script error [: !=: unary operator expected
In my script I am trying to error check if the first and only argument is equal to -v but it is an optional argument. I use an if statement but I keep getting the unary operator expected error.
...
Simple Vim commands you wish you'd known earlier [closed]
I'm learning new commands in Vim all the time, but I'm sure everyone learns something new once in a while. I just recently learned about this:
...