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How does push notification technology work on Android?
...ions don't have to be running to receive the intents.
More information at http://developer.android.com/google/gcm/gcm.html
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NodeJS / Express: what is “app.use”?
... is a method to configure the middleware used by the routes of the Express HTTP server object. The method is defined as part of Connect that Express is based upon.
Update Starting with version 4.x, Express no longer depends on Connect.
The middleware functions that were previously included with E...
How do I unlock a SQLite database?
...
In windows you can try this program http://www.nirsoft.net/utils/opened_files_view.html to find out the process is handling db file. Try closed that program for unlock database
In Linux and macOS you can do something similar, for example, if your locked file i...
Efficiently test if a port is open on Linux?
...tors. To use:
exec 6<>/dev/tcp/ip.addr.of.server/445
echo -e "GET / HTTP/1.0\n" >&6
cat <&6
I'm using 6 as the file descriptor because 0,1,2 are stdin, stdout, and stderr. 5 is sometimes used by Bash for child processes, so 3,4,6,7,8, and 9 should be safe.
As per the comment ...
PHP regular expressions: No ending delimiter '^' found in
...need the capturing group, and can simplify the regex to /^\d+$/.
Example: http://ideone.com/Ec3zh
See also: PHP - Delimiters
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How to count items in a Go map?
...
Use len(m). From http://golang.org/ref/spec#Length_and_capacity
len(s) string type string length in bytes
[n]T, *[n]T array length (== n)
[]T slice length
map[K]T map length (n...
Superscript in CSS only?
...
http://htmldog.com/articles/superscript/ Essentially:
position: relative;
bottom: 0.5em;
font-size: 0.8em;
Works well in practice, as far as I can tell.
...
How to use multiple AWS Accounts from the command line?
...ll be JSON
aws ec2 describe-instances --profile {{profile_name}}
Ref
http://docs.aws.amazon.com/cli/latest/userguide/cli-chap-getting-started.html#cli-multiple-profiles
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How do I implement a callback in PHP?
...cb(). call_user_func and call_user_func_array support all the above.
See: http://php.net/manual/en/language.types.callable.php
Notes/Caveats:
If the function/class is namespaced, the string must contain the fully-qualified name. E.g. ['Vendor\Package\Foo', 'method']
call_user_func does not supp...
System.Security.SecurityException when writing to Event Log
...rity key (as suggested by Firenzi and royrules22) follow instructions from http://geekswithblogs.net/timh/archive/2005/10/05/56029.aspx
Open the Registry Editor:
Select Start then Run
Enter regedt32 or regedit
Navigate/expand to the following key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Se...