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How do I use LINQ Contains(string[]) instead of Contains(string)
...; table = GetDataFromSomewhere();
List<user> newTable = table.Where(xx => uids.Contains(xx.uid)).ToList();
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sed: print only matching group
...up within a pattern, you can do it with a 2nd grep.
# To extract \1 from /xx([0-9]+)yy/
$ echo "aa678bb xx123yy xx4yy aa42 aa9bb" | grep -Eo 'xx[0-9]+yy' | grep -Eo '[0-9]+'
123
4
# To extract \1 from /a([0-9]+)b/
$ echo "aa678bb xx123yy xx4yy aa42 aa9bb" | grep -Eo 'a[0-9]+b' | grep -Eo '[0-9]+'
...
Equivalent of LIMIT and OFFSET for SQL Server?
...IELD}) as r_n_n
from {YOUR TABLES} where {OTHER OPTIONAL FILTERS}
) xx where r_n_n >={OFFSET HERE}
A note:
This solution will only work in SQL Server 2005 or above, since this was when ROW_NUMBER() was implemented.
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what happens when you type in a URL in browser [closed]
...t
browser checks if the response is a redirect or a conditional response (3xx result status codes), authorization request (401), error (4xx and 5xx), etc.; these are handled differently from normal responses (2xx)
if cacheable, response is stored in cache
browser decodes response (e.g. if it's gzipp...
How to free memory in Java?
...is slightly too small, you're going to pay for it.) For example, in G1:
XX:G1NewSizePercent (defaults to 5; probably doesn't matter.)
XX:G1MaxNewSizePercent (defaults to 60; probably raise this.)
Consider telling the garbage collector you're not okay with a longer pause. This will cause more-fr...
Regular expression for a hexadecimal number?
...
How about the following?
0[xX][0-9a-fA-F]+
Matches expression starting with a 0, following by either a lower or uppercase x, followed by one or more characters in the ranges 0-9, or a-f, or A-F
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How is the default max Java heap size determined?
...nd out the defaults on the system where your applications runs.
java -XX:+PrintFlagsFinal -version | findstr HeapSize
Look for the options MaxHeapSize (for -Xmx) and InitialHeapSize for -Xms.
On a Unix/Linux system, you can do
java -XX:+PrintFlagsFinal -version | grep HeapSize
I believ...
Getting Http Status code number (200, 301, 404, etc.) from HttpWebRequest and HttpWebResponse
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You have to be careful, server responses in the range of 4xx and 5xx throw a WebException. You need to catch it, and then get status code from a WebException object:
try
{
wResp = (HttpWebResponse)wReq.GetResponse();
wRespStatusCode = wResp.StatusCode;
}
catch (WebException...
How do I get an apk file from an Android device?
...b shell pm list packages -f -3
the output will be
package:/data/app/XX.XX.XX.apk=YY.YY.YY
now pull that package using below code:
adb pull /data/app/XX.XX.XX.apk
if you executed above cmd in C:>\ , then you will find that package there.
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Do any JVM's JIT compilers generate code that uses vectorized floating point instructions?
... small snippet of vectorizable math.
Run their benchmark flipping between -XX:-UseSuperWord and -XX:+UseSuperWord(default)
If no difference in performance is observed, your code probably didn't get vectorized
To make sure, run your benchmark such that it prints out the assembly. On linux you can enj...