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What does the 'b' character do in front of a string literal?
...e learned about char and strings, because a character is not a byte. That idea is long obsolete.
You use str when you want to represent text.
print('שלום עולם')
You use bytes when you want to represent low-level binary data like structs.
NaN = struct.unpack('>d', b'\xff\xf8\x00\x00\x00\...
ERROR 2006 (HY000): MySQL server has gone away
...MySQL server has gone away.
Debugging
Here are few expert-level debug ideas:
Check the logs, e.g.
sudo tail -f $(mysql -Nse "SELECT @@GLOBAL.log_error")
Test your connection via mysql, telnet or ping functions (e.g. mysql_ping in PHP).
Use tcpdump to sniff the MySQL communication (won't wor...
How can I force clients to refresh JavaScript files?
... This uses PHP tags and if one uses PHP, it is indeed a good idea.
– Jerther
Apr 19 '17 at 12:31
3
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Difference between doseq and for in Clojure
... How does doseq handle evaluation of infinite lazy sequence? bad idea? only call it on finite sequences, either eager or lazy?
– johnbakers
Jan 25 '14 at 9:15
...
What are the alternatives now that the Google web search API has been deprecated? [closed]
...
@Pacerier, I have no idea about it. Maybe the policy have changed?
– Yishu Fang
Sep 18 '15 at 14:43
add a comment
...
Change a Git remote HEAD to point to something besides master
...
There was almost the same question on GitHub a year ago.
The idea was to rename the master branch:
git branch -m master development
git branch -m published master
git push -f origin master
Making master have what you want people to use, and do all other work in branches.
(a "git-sy...
How to use the “number_to_currency” helper method in the model rather than view?
...sages to be realized in the data layer, rather than returning the semantic idea of an error to be realized later—sigh. You can get around this, but it basically means not using ActiveModel::Errors anymore. I’ve done it, it works well.
As an aside, here’s a useful way to include helpers in a p...
PHP code to remove everything but numbers
...ags)) the people who designed/wrote the function/API thought it was a good idea to pass the regex flags with the double quoted /flags form instead of using an extra function parameter.
– Qtax
Jul 7 '11 at 0:28
...
Converting timestamp to time ago in PHP e.g 1 day ago, 2 days ago…
...ar past (say 30 years near past and less) it give us non-precise humans an idea how long ago an event occurred. Worked well for my application.
– Tim Dearborn
Sep 27 '15 at 13:17
...
What's the best way to set a single pixel in an HTML5 canvas?
...canvas.arc(x, y, 1, 0, 2 * Math.PI, true);
canvas.stroke();
}
the same idea as with rectangle you can achieve with fill.
function point(x, y, canvas){
canvas.beginPath();
canvas.arc(x, y, 1, 0, 2 * Math.PI, true);
canvas.fill();
}
Problems with all these solutions:
it is hard to keep ...