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When to throw an exception?
...es not expect. UserNameNotValidException , PasswordNotCorrectException etc.
32 Answers
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How to get a random value from dictionary in python
...b': 5}
>>> d.popitem()
('c', 7)
Since the dict doesn't preserve order, by using popitem you get items in an arbitrary (but not strictly random) order from it.
Also keep in mind that popitem removes the key-value pair from dictionary, as stated in the docs.
popitem() is useful to dest...
MySQL Server has gone away when importing large sql file
...qld’s my.cnf configuration file is large enough. On Debian: sudo nano
/etc/mysql/my.cnf, set wait_timeout = 600 seconds (you can
tweak/decrease this value when error 2006 is gone), then sudo
/etc/init.d/mysql restart. I didn't check, but the default value for
wait_timeout might be around 2...
Locate the nginx.conf file my nginx is actually using
...default nginx config file path.
$ nginx -t
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
$ nginx -V
nginx version: nginx/1.11.1
built by gcc 4.9.2 (Debian 4.9.2-10)
built with OpenSSL 1.0.1k 8 Jan 2015
TLS SNI su...
Select Row number in postgres
...
You should also specify an order in OVER clause: OVER (ORDER BY id). Otherwise the order is not guaranteed.
– AlexM
Jun 14 '16 at 4:30
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Understanding Python super() with __init__() methods [duplicate]
... will call the correct next parent class function in the Method Resolution Order (MRO).
In Python 3, we can call it like this:
class ChildB(Base):
def __init__(self):
super().__init__()
In Python 2, we are required to use it like this:
super(ChildB, self).__init__()
Without super...
List vs List
...for example, Map<String, int>. Your consumer method might break.
In order to ensure that List can hold objects of a given type, Java generics introduced ? extends. So in #1, the List can hold any object which is derived from Map<String, String> type. Adding any other type of data would ...
What is the difference between an IntentService and a Service? [duplicate]
...d on your system. For example,
If you went to a hotel and you give your order for a soup to a server
The server gets your order and sends to chef
You don't know how the soup is made in the kitchen and what processes are required for making the soup
Once your order is ready, the server brings you ...
How to prevent Browser cache for php site
...0', FALSE);
header('Pragma: no-cache');
AND Option 2 IS ALWAYS BETTER in order to avoid proxy based caching issue.
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List directory tree structure in python?
... Nice tool, do you have a quick example on how to use criteria in order to exclude folder names?
– Matt-Mac-Muffin
Nov 2 '19 at 22:00
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