大约有 47,000 项符合查询结果（耗时：0.0640秒） [XML]
Regular expression to limit number of characters to 10
...
It might be beneficial to add greedy matching to the end of the string, so you can accept strings > than 10 and the regex will only return up to the first 10 chars. /^[a-z0-9]{0,10}$?/
share
|
...
INSERT with SELECT
...
22 and '22' should not matter to sql, but I put a string in case that the field is similar to an unique identifier.
– Dumitrescu Bogdan
Mar 22 '11 at 12:54
...
SQL exclude a column using SELECT * [except columnA] FROM tableA?
...you could use SET @variable = (SELECT ... FOR XML PATH('')) to concatenate strings.
Use the ISNULL function to prepend a comma only if this is not the
first column name.
Use the QUOTENAME function to support spaces and punctuation in column names.
Use the WHERE clause to hide columns we don't want t...
What does the `forall` keyword in Haskell/GHC do?
I'm beginning to understand how the forall keyword is used in so-called "existential types" like this:
8 Answers
...
Finding Number of Cores in Java
...tNumberOfCPUCores() {
OSValidator osValidator = new OSValidator();
String command = "";
if(osValidator.isMac()){
command = "sysctl -n machdep.cpu.core_count";
}else if(osValidator.isUnix()){
command = "lscpu";
}else if(osValidator.isWindows()){
command = "...
All combinations of a list of lists
...ight up recursion for this task, and if you need a version that works with strings, this might fit your needs:
combinations = []
def combine(terms, accum):
last = (len(terms) == 1)
n = len(terms[0])
for i in range(n):
item = accum + terms[0][i]
if last:
comb...
How to get maximum value from the Collection (for example ArrayList)?
...lections.min() method.
public class MaxList {
public static void main(String[] args) {
List l = new ArrayList();
l.add(1);
l.add(2);
l.add(3);
l.add(4);
l.add(5);
System.out.println(Collections.max(l)); // 5
System.out.println(Coll...
How to get a group of toggle buttons to act like radio buttons in WPF?
...
If a add content other then a simple string i get a "Element is already the child of another element." error. Is there a way arround this?
– Tobias Hoefer
Jul 21 '15 at 12:49
...
Best practices for styling HTML emails [closed]
...d images as attachments, instead they should be included as base64-encoded strings to replace the url referenced in "normal" <img> tags, like so: <img alt="Embedded Image" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADIA...">
– Timo
Feb 12 '1...
Which browsers support ?
...is not recommended) should just be present or being set to either an empty string or itself (defer="defer", especially important when writing XHTML compliant documents); when setting the element's property on-the-fly using JavaScript, one should use s.async = true.
– Marcel Kor...