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Create an index on a huge MySQL production table without table locking
...ted. MySQL is really, really stupid about this (and a few other things).
Test Script:
(
for n in {1..50}; do
#(time mysql -uroot -e 'select * from website_development.users where id = 41225\G'>/dev/null) 2>&1 | grep real;
(time mysql -uroot -e 'update website_development.u...
How to extract text from a string using sed?
...
How about using grep -E?
echo "This is 02G05 a test string 20-Jul-2012" | grep -Eo '[0-9]+G[0-9]+'
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Determine if string is in list in JavaScript
...'b')
This has some inherent benefits over indexOf because it can properly test for the presence of NaN in the list, and can match missing array elements such as the middle one in [1, , 2] to undefined. includes also works on JavaScript typed arrays such as Uint8Array.
If you're concerned about brow...
Why use strict and warnings?
... separator.
use strict 'subs';
Consider two programs
# prog 1
$a = test_value;
print "First program: ", $a, "\n";
sub test_value { return "test passed"; }
Output: First program's result: test_value
# prog 2
sub test_value { return "test passed"; }
$a = test_value;
print "Sec...
ITunes review URL and iOS 7 (ask user to rate our app) AppStore show a blank page
... It correctly works on both iPhone and iPad in iOS 8.3. Just tested :) Thank you!
– alones
May 11 '15 at 7:57
2
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How do I create a self-signed certificate for code signing on Windows?
...ublisher of this driver software" error dialog. The key was to install the test root certificate with
certutil -addstore Root Demo_CA.cer
which Roger's answer didn't quite cover.
Here is a batch file that worked for me (with my .inf file, not included).
It shows how to do it all from start to fi...
Can not deserialize instance of java.util.ArrayList out of START_OBJECT token
...ually a JSON Array - that would look like this:
[
{
"name": "Test order1",
"detail": "ahk ks"
},
{
"name": "Test order2",
"detail": "Fisteku"
}
]
Since you're not controlling the exact process of deserialization (RestEasy does) - a first option wou...
Turn on IncludeExceptionDetailInFaults (either from ServiceBehaviorAttribute or from the
...ot disclosing the exeption details to a publicly released version, but for testing purposes this is a handy tool. Always turn back off when releasing.
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Does async(launch::async) in C++11 make thread pools obsolete for avoiding expensive thread creation
...s under the impression that Linux thread creation was very cheap and after testing I determined that the overhead of function call in a new thread vs. a normal one is enormous. The overhead for creating a thread to handle a function call is something like 10000 or more times slower than a plain func...
Strengths of Shell Scripting compared to Python [closed]
...rite a simple shell loop to do a number of operations using commands like "test" and "expr" and compare the run times with a Python script that uses the "os" module. Commands like test and expr often involve forking a subprocess to do the real work.
– S.Lott
A...