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Create table in SQLite only if it doesn't exist already
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From http://www.sqlite.org/lang_createtable.html:
CREATE TABLE IF NOT EXISTS some_table (id INTEGER PRIMARY KEY AUTOINCREMENT, ...);
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How can I add a key/value pair to a JavaScript object?
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what if the key is a number? obj.123 = 456 doesn't work. obj[123] = 456 does work though
– axel freudiger
Nov 2 '12 at 10:39
13
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Is it possible to define more than one function per file in MATLAB, and access them from outside tha
...t;> makefuns
ans =
Done importing functions to workspace
>> fun1(123)
ans =
123
>> fun2()
ans =
1
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XMLHttpRequest cannot load file. Cross origin requests are only supported for HTTP
...ommand: ipconfig and hit Enter.
Look for: IPv4 Address . . . . . . . . 12.123.123.00
There are websites that will also display your IP address
If you don't have Python, download and install it.
Using the 'Command Prompt' you must go to the folder where the files are that you want to serve as a w...
Tracking the script execution time in PHP
... "This page was created in ".$totaltime." seconds";
;?>
From (http://www.developerfusion.com/code/2058/determine-execution-time-in-php/)
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Fastest way to count exact number of rows in a very large table?
...nly speculate. Does the db maintenance process find out that there are 42,123,876 rows in table A and then create 42,123,876 empty rows in table B, and then loop through table A and update the rows in table B...? Or is it crazier than that? ;-)
– Tony Andrews
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MySQL pagination without double-querying?
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This post from the MySQL performance blog explains this further:
http://www.mysqlperformanceblog.com/2007/08/28/to-sql_calc_found_rows-or-not-to-sql_calc_found_rows/
For more information on optimising pagination, check this post and this post.
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Visualizing branch topology in Git
... %C(dim white)- %an <%ae> %C(reset) %C(dim white)(committer: %cn <%ce>)%C(reset)'
git lg/git lg1 looks like this:
git lg2 looks like this:
and git lg3 looks like this:
It should be noted that this isn't meant as a end-all-be-all solution— it's a template for you to ch...
Microsecond timing in JavaScript
...th=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4...
PHP Array to CSV
...tps://coderwall.com/p/zvzwwa/array-to-comma-separated-string-in-php
http://www.php.net/manual/en/function.fputcsv.php
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