大约有 15,208 项符合查询结果（耗时：0.0252秒） [XML]
MySQL vs MongoDB 1000 reads
... (the actual binary json document)
So a b-tree lookup, and a binary page read. Log(n) + 1 IOs. If the indexes can reside entirely in memory, then 1 IO.
In MySQL with 20 tables, you have to perform:
One index lookup on the root table (again, assuming the entity is fetched by id)
With a clustered...
jQuery: how to change title of document during .ready()?
...ested layouts in Ruby on Rails, and in one of the layouts i have a need to read in a string from a div and set that as the title of the document. What is correct way (if any) to set the title of the document?
...
Spring RestTemplate timeout
...turn restTemplateBuilder
.setConnectTimeout(...)
.setReadTimeout(...)
.build();
}
}
For Spring Boot <= 1.3
@Configuration
public class AppConfig
{
@Bean
@ConfigurationProperties(prefix = "custom.rest.connection")
public HttpComponentsClientHtt...
Why is i++ not atomic?
... which uses the ll and sc: load-linked, and store-conditional. Load-linked reads the word, and store-conditional stores the new value if the word has not changed, or else it fails (which is detected and causes a re-try).
sha...
Why is it common to put CSRF prevention tokens in cookies?
... whole issue with CSRF and appropriate ways to prevent it. (Resources I've read, understand, and agree with: OWASP CSRF Prevention CHeat Sheet , Questions about CSRF .)
...
Effect of NOLOCK hint in SELECT statements
...on't care what state it is in, and don't bother holding it still while you read from it. It is all at once faster, less resource-intensive, and very very dangerous.
You should be warned to never do an update from or perform anything system critical, or where absolute correctness is required using ...
What's the fuss about Haskell? [closed]
... program to copy a file --
import System.Environment
main = do
--read command-line arguments
[file1, file2] <- getArgs
--copy file contents
str <- readFile file1
writeFile file2 str
OK, it's a short, readable program. In that sense it's better t...
How does “cat
...h:
Here Documents
This type of redirection instructs the shell to read input from
the current source until a line
containing only word (with no trailing
blanks) is seen.
All of the lines read up to that point are then used as the
standard input for a command.
The format ...
How to read contacts on Android 2.0
... that you have added
<uses-permission android:name="android.permission.READ_CONTACTS"/>
to your AndroidManifest.xml file, then you can loop through your phone contacts like this:
Cursor cursor = getContentResolver().query(ContactsContract.Contacts.CONTENT_URI,null, null, null, null);
whi...
Does the 'mutable' keyword have any purpose other than allowing the variable to be modified by a con
...able.
With your const reference or pointer you are constrained to:
only read access for any visible data members
permission to call only methods that are marked as const.
The mutable exception makes it so you can now write or set data members that are marked mutable. That's the only externally...