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Which data type for latitude and longitude?
...y) which can be your lat / long. Occupies 16 bytes: 2 float8 numbers internally.
Or make it two columns of type float (= float8 or double precision). 8 bytes each.
Or real (= float4) if additional precision is not needed. 4 bytes each.
Or even numeric if you need absolute precision. 2 bytes for eac...
Regex exactly n OR m times
...character before) as you can see here: https://regex101.com/r/oC5oJ4/1
Finally, to match the one character distant match, you can add a positive look ahead (?=) on the "no 'x' after" or a positive look behind (?<=) on the "no 'x' before", like this: https://regex101.com/r/mC4uX3/1
(?<=[^x]|^...
How to commit no change and new message?
...
There's rarely a good reason to do this, but the parameter is --allow-empty for empty commits (no files changed), in contrast to --allow-empty-message for empty commit messages. You can also read more by typing git help commit or visiting the online documentation.
While the tree object (w...
C++ Exceptions questions on rethrow of original exception
...he catch cause the rethrown exception to see the effect of append() being called?
4 Answers
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Chrome Extension Message passing: response not sent
...will keep the message channel open to the other end until sendResponse is called).
So you just need to add return true; after the call to getUrls to indicate that you'll call the response function asynchronously.
share
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How to take backup of a single table in a MySQL database?
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SQL usually compresses well--you can pipe the command above through gzip and the resulting file will be much smaller: mysqldump db_name table_name | gzip > table_name.sql.gz to restore: gunzip < table_name.sql.gz | mysql -u...
Should I use .done() and .fail() for new jQuery AJAX code instead of success and error
...recation Notice:
The jqXHR.success(), jqXHR.error(), and jqXHR.complete() callbacks will be deprecated in jQuery 1.8. To prepare your code for their eventual removal, use jqXHR.done(), jqXHR.fail(), and jqXHR.always() instead.
If you are using the callback-manipulation function (using method-chaini...
Increase number of axis ticks
I'm generating plots for some data, but the number of ticks is too small, I need more precision on the reading.
5 Answers...
Push to GitHub without a password using ssh-key
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Here's a quick one-liner shell command that will automatically change your https url to the appropriate git one (Only works for github urls!): git remote set-url origin $(git remote show origin | grep "Fetch URL" | sed 's/ *Fetch URL: //' | sed 's/https:\/\/github.com\//git@github.c...
Drawing an image from a data URL to a canvas
...strDataURI;
The drawImage() method of HTML5 Canvas Context lets you copy all or a portion of an image (or canvas, or video) onto a canvas.
You might use it like so:
var myCanvas = document.getElementById('my_canvas_id');
var ctx = myCanvas.getContext('2d');
var img = new Image;
img.onload = func...