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Check whether a string matches a regex in JS
... but test() works also with integers.
12345.match(/^([a-z0-9]{5,})$/); // ERROR
/^([a-z0-9]{5,})$/.test(12345); // true
/^([a-z0-9]{5,})$/.test(null); // false
// Better watch out for undefined values
/^([a-z0-9]{5,})$/.test(undefined); // true
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Delete all data in SQL Server database
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I was getting error - DELETE failed because the following SET options have incorrect settings: 'QUOTED_IDENTIFIER'.... For me worked: EXEC sp_MSForEachTable 'SET QUOTED_IDENTIFIER ON; DELETE FROM ?'
– kasi
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Show pending migrations in rails
...s 2.3.3, not sure when it was introduced). The description says 'Raises an error if there are pending migrations'. This seems to be used more as a prerequisite for other tasks, but I'm guessing you could use it for your purposes.
EDIT: Here is an example of the output after having just generated an...
Maven package/install without test (skip tests)
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If you are trying this in Windows Powershell, you will get this error:
[ERROR] Unknown lifecycle phase ".test.skip=true". You must specify a valid lifecycle phase or a goal in the format...
The reason for this is, in Powershell the "-" has special meaning and it is causing problem with...
Keep CMD open after BAT file executes
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Beware that if your program contains syntactical errors, the window will still close if you ran it via double-click and put cmd /k at the end.
– Tobias Feil
Jun 25 '19 at 6:47
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Which characters are valid in CSS class names/selectors?
...ryl Of course, this is a pretty extreme example, but stuff like class="404-error" can be useful.
– Mathias Bynens
Jul 7 '11 at 15:12
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MySQL Great Circle Distance (Haversine formula)
..._rad = $distance/$R;
$distance_rad_plus = $distance_rad * 1.06; // ovality error for outer bounding box
$dist_deg_lat = rad2deg($distance_rad_plus); //outer bounding box
$dist_deg_lon = rad2deg($distance_rad_plus/cos(deg2rad($lat)));
$dist_deg_lat_small = rad2deg($distance_rad/sqrt(2)); //inner boun...
What algorithms compute directions from point A to point B on a map?
...sman problem to solve routing problems. The trick with ACO is to build an error calculation based upon known facts of the routing so that the graph solving model knows when to quit (when is the error small enough).
You can google ACO or TSP to find more on this technique. I've not used any of the...
Node.js + Nginx - What now?
...omain.com;
access_log /var/log/nginx/subdomain.your_domain.access.log;
error_log /var/log/nginx/subdomain.your_domain.error.log debug;
location / {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarder-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host...
Where does R store packages?
...library") to my Rprofile.site file. I launch R 2.13.1 64 bit and get this error: Error: cannot change value of locked binding for '.libPaths' I am using Windows 7.
– Fred
Jul 15 '11 at 15:18
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