大约有 39,000 项符合查询结果（耗时：0.0382秒） [XML]
PHP Regex to check date is in YYYY-MM-DD format
...
198
Try this.
$date="2012-09-12";
if (preg_match("/^[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[...
Does a favicon have to be 32x32 or 16x16?
... as the smallest baseline.
For IE, Microsoft recommends 16x16, 32x32 and 48x48 packed in the favicon.ico file.
For iOS, Apple recommends specific file names and resolutions, at most 180x180 for latest devices running iOS 8.
Android Chrome primarily uses a manifest and also relies on the Apple touch...
How to convert Strings to and from UTF8 byte arrays in Java
In Java, I have a String and I want to encode it as a byte array (in UTF8, or some other encoding). Alternately, I have a byte array (in some known encoding) and I want to convert it into a Java String. How do I do these conversions?
...
Is it Pythonic to use list comprehensions for just side effects?
...
85
It is very anti-Pythonic to do so, and any seasoned Pythonista will give you hell over it. The ...
How to get UTC time in Python?
...
185
Try this code that uses datetime.utcnow():
from datetime import datetime
datetime.utcnow()
F...
Efficient SQL test query or validation query that will work across all (or most) databases
...FORMATION_SCHEMA.SYSTEM_USERS
or
CALL NOW()
HSQLDB (tested with version 1.8.0.10)
Note: I tried using a WHERE 1=0 clause on the second query, but it didn't work as a value for Apache Commons DBCP's validationQuery, since the query doesn't return any rows
VALUES 1 or SELECT 1 FROM SYSIBM.SYSDUMM...
Why is String.chars() a stream of ints in Java 8?
In Java 8, there is a new method String.chars() which returns a stream of int s ( IntStream ) that represent the character codes. I guess many people would expect a stream of char s here instead. What was the motivation to design the API this way?
...
JS Client-Side Exif Orientation: Rotate and Mirror JPEG Images
...on can be spotty 1 . The same source also provides a nice summary of the 8 different orientations a JPEG can have:
12 A...
List all sequences in a Postgres db 8.1 with SQL
...
edited Mar 11 '11 at 10:48
community wiki
2 re...
How to declare an ArrayList with values? [duplicate]
... = List.of("xyz", "abc");
// 'var' works only for local variables
Java 8 using Stream:
Stream.of("xyz", "abc").collect(Collectors.toList());
And of course, you can create a new object using the constructor that accepts a Collection:
List<String> x = new ArrayList<>(Arrays.asLis...