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How do you use String.substringWithRange? (or, how do Ranges work in Swift?)
...S. So confusing that you have to find your index before you can use it. No idea why it took me so long to realise, but thanks for your contribution to human kind.
– Warpzit
May 1 '17 at 13:44
...
Getting visitors country from their IP
... i use it in geoip_country_code_by_addr($gi, $ip), it returns nothing, any idea?
– mOna
Sep 21 '14 at 15:13
It is a re...
How to delay the .keyup() handler until the user stops typing?
...96), which is better than this answer and worth studying to understand the idea behind simple, slick binding to allow different timers for different elements - the same principle used in the plugin code above, but easier to understand.
– Dan Nissenbaum
Nov 29 '...
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
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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
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