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Confused by python file mode “w+”
...et's say you're opening the file with a with statement like you should be. Then you'd do something like this to read from your file:
with open('somefile.txt', 'w+') as f:
# Note that f has now been truncated to 0 bytes, so you'll only
# be able to read data that you write after this point
...
Order of member constructor and destructor calls
...earance of the base class
names in the derived class
base-specifier-list.
Then, direct
base classes shall be initialized in
declaration order as they appear in
the base-specifier-list (regardless of
the order of the mem-initializers).
Then, non-static data members shall be
initialized in the order...
What's a concise way to check that environment variables are set in a Unix shell script?
...probably add that the colon command simply has its arguments evaluated and then succeeds. It is the original shell comment notation (before '#' to end of line). For a long time, Bourne shell scripts had a colon as the first character. The C Shell would read a script and use the first character to...
Is there a command like “watch” or “inotifywait” on the Mac?
I want to watch a folder on my Mac (Snow Leopard) and then execute a script (giving it the filename of what was just moved into a folder (as a parameter... x.sh "filename")).
...
What is the difference between and ?
...
@MarcelKorpel Why is this the accepted answer then? Not disputing, just wondering why there is inconsistency.
– Anshul
Dec 24 '17 at 23:24
3
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What are the best practices for SQLite on Android?
...the same time, one will fail. It will not wait till the first is done and then write. It will simply not write your change. Worse, if you don’t call the right version of insert/update on the SQLiteDatabase, you won’t get an exception. You’ll just get a message in your LogCat, and that will...
What are the primary differences between TDD and BDD? [closed]
... password 'letmein'
When the user logs in with username and password
Then the login form should be shown again
(In his article, Tom goes on to directly execute this test specification in Ruby.)
The pope of BDD is Dan North. You'll find a great introduction in his Introducing BDD article.
Y...
Spring: Why do we autowire the interface and not the implemented class?
...ut the (interface, implementation) pair. If component scan is not enabled, then you have to define the bean explicitly in your application-config.xml (or equivalent spring configuration file).
Do I need @Qualifier or @Resource?
Once you have more than one implementation, then you need to quali...
Django datetime issues (default=datetime.now())
...will be called each time a record is added. If you pass it datetime.now(), then you are just evaluating the function and passing it the return value.
More information is available at Django's model field reference
share
...
How to query MongoDB with “like”?
..., it depends. If the query doesn't use an index, and must do a table scan, then it can certainly be expensive. If you're doing a 'starts with' regex query, then that can use an index. Best to run an explain() to see what's happening.
– Kyle Banker
Jul 22 '10 at...