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How do you detect Credit card type based on number?
...low: Credit for original expressions
Visa: ^4[0-9]{6,}$ Visa card numbers start with a 4.
MasterCard: ^5[1-5][0-9]{5,}|222[1-9][0-9]{3,}|22[3-9][0-9]{4,}|2[3-6][0-9]{5,}|27[01][0-9]{4,}|2720[0-9]{3,}$ Before 2016, MasterCard numbers start with the numbers 51 through 55, but this will only detect M...
How do I grant myself admin access to a local SQL Server instance?
...erver\MSSQL10_50.MSSQLSERVER\MSSQL\Binn
Now run the following command to start SQL Server in single user mode. As
SQLCMD is being specified, only one SQLCMD connection can be made (from another command prompt window).
sqlservr -m"SQLCMD"
Now, open another command prompt window as the same user...
How to know if other threads have finished?
I have an object with a method named StartDownload() , that starts three threads.
12 Answers
...
MVVM: Tutorial from start to finish?
...video. Although I have found many, I have not found one that takes me from start to finish. What I really want is a tutorial that doesn't assume any previous WPF knowledge.
...
How do I get time of a Python program's execution?
...
The simplest way in Python:
import time
start_time = time.time()
main()
print("--- %s seconds ---" % (time.time() - start_time))
This assumes that your program takes at least a tenth of second to run.
Prints:
--- 0.764891862869 seconds ---
...
Why does my Spring Boot App always shutdown immediately after starting?
...org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
For Gradle (build.gradle) it looks like
dependencies {
compile 'org.springframework.boot:spring-boot-starter-web'
}
...
Why do variable names often start with the letter 'm'? [duplicate]
...h as the Notepad tutorial , I noticed that almost all variables are named starting with the letter 'm'. What convention is this, and where does it originate from?
...
How to generate a range of numbers between two numbers?
...
an alternative solution is recursive CTE:
DECLARE @startnum INT=1000
DECLARE @endnum INT=1050
;
WITH gen AS (
SELECT @startnum AS num
UNION ALL
SELECT num+1 FROM gen WHERE num+1<=@endnum
)
SELECT * FROM gen
option (maxrecursion 10000)
...
Run a Java Application as a Service on Linux
.../local/MyProject/MyJar.jar
PID_PATH_NAME=/tmp/MyService-pid
case $1 in
start)
echo "Starting $SERVICE_NAME ..."
if [ ! -f $PID_PATH_NAME ]; then
nohup java -jar $PATH_TO_JAR /tmp 2>> /dev/null >> /dev/null &
echo $! > $PID_PATH_NAME
...
Can't compare naive and aware datetime.now()
...done using:
import datetime
import pytz
utc=pytz.UTC
challenge.datetime_start = utc.localize(challenge.datetime_start)
challenge.datetime_end = utc.localize(challenge.datetime_end)
# now both the datetime objects are aware, and you can compare them
Note: This would raise a ValueError if tzinf...