大约有 40,000 项符合查询结果（耗时：0.0563秒） [XML]
Which access modifiers are implied when not specified?
...In lower-level languages like C or C++, you can get at private fields just by moving pointers around. Short of the safeguards at the OS-level, like DEP and encrypted memory, access modifiers are just compiler-provided assistance to help you write better code. ...Right?
– pbar...
List of Big-O for PHP functions
... why you said they are "really O(n)" and not "really O(logn)". Great post by the way!
– Cam
Jun 11 '11 at 8:32
...
String concatenation in Ruby
I am looking for a more elegant way of concatenating strings in Ruby.
16 Answers
16
...
When to use Amazon Cloudfront or S3
... for high performance delivery of your content. (Amazon)
The data served by CloudFront may or may not come from S3. Since it is more optimized for delivery speed, the bandwidth costs a little more.
If your user base is localized, you won't see too much difference working with S3 or CloudFront (bu...
What is the Oracle equivalent of SQL Server's IsNull() function?
...
+1: COALESCE is ANSI, supported by Postgres, MySQL... The only caveat is that it doesn't necessarily perform as fast as native syntax.
– OMG Ponies
Aug 19 '10 at 17:33
...
How many characters can UTF-8 encode?
...
UTF-8 does not use one byte all the time, it's 1 to 4 bytes.
The first 128 characters (US-ASCII) need one byte.
The next 1,920 characters need two bytes to encode. This covers the remainder of almost all Latin alphabets, and also Greek, Cy...
Regex how to match an optional character
...
You can make the single letter optional by adding a ? after it as:
([A-Z]{1}?)
The quantifier {1} is redundant so you can drop it.
share
|
improve this answer
...
Find the extension of a filename in Ruby
... portion of a Rails app. Different types of files are handled differently by the app.
4 Answers
...
Default behavior of “git push” without a branch specified
...
You can control the default behavior by setting push.default in your git config. From the git-config(1) documentation:
push.default
Defines the action git push should take if no refspec is given on the command line, no refspec is configured in the remote, and...
How to create Android Facebook Key Hash?
...
First create a keystore by going to Build --> Build Apk from your studio. provide a name and password etc. Store it as a .jks file at a folder easily accessible. Now copy the path and generate the key by replacing that path in the above mentioned...