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Visibility of global variables in imported modules
...y this, because in, say, C, a global is the same across all implementation files unless you explicitly make it static.)
There are different ways to solve this, depending on your actual use case.
Before even going down this path, ask yourself whether this really needs to be global. Maybe you real...
How do I “un-revert” a reverted Git commit?
... Good lord, don't use git add -A ...unless you want to add every file to version control, which is most likely not what you want.
– Kaitain
Jan 29 at 23:37
...
Change directory command in Docker?
...t, or a more complex parameter to the RUN. Here is an example from a Dockerfile I've downloaded to look at previously:
RUN cd /opt && unzip treeio.zip && mv treeio-master treeio && \
rm -f treeio.zip && cd treeio && pip install -r requirements.pip
Becau...
Comparing Dates in Oracle SQL
... database but they can be altered by changing your inialization parameters file - only if really required - or at the session level by using the ALTER SESSION syntax. For instance:
alter session set nls_date_format = 'DD.MM.YYYY HH24:MI:SS';
This means:
DD numeric day of the month, 1 - 31
MM nu...
MySql : Grant read only options?
...password';
The host name must be resolvable by DNS or by the local hosts file.
At the mysql prompt, type the following command:
flush privileges;
Type quit.
The following is a list of example commands and confirmation messages:
mysql> grant select on dbname.* to 'readonlyuser'@'%' identifi...
Does Foreign Key improve query performance?
...Indexes on fields you use frequently. If you use SQL Server you can use profiler to profile a specific database and take the file that outputs and use the tuning wizard to recieve recommendations on where to place your indexes. I also like using profiler to flush out long running stored procedures, ...
Set variable in jinja
... can we create a global jinja variable and use it throughout the html file in which we embed the jinja variable? @Soviut
– Sri Test
Jun 19 at 12:48
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Selecting data from two different servers in SQL Server
... OPENROWSET has BULK facilities as well that may/may not require a format file which might be fiddley
OPENQUERY: Doesn't support variables
All are T-SQL solutions. Relatively easy to implement and set up
All are dependent on connection between source and destionation which might affect performance ...
Number of days between two dates in Joda-Time
...ing an input from a web page, might be ok, but if you are processing a log file with hundreds of thousands of lines this just makes it very slow
– JBoy
Jun 21 '16 at 21:37
...
How to delete items from a dictionary while iterating over it?
...-------------------------------------
Traceback (most recent call last):
File "<ipython console>", line 1, in <module>
RuntimeError: dictionary changed size during iteration
As stated in delnan's answer, deleting entries causes problems when the iterator tries to move onto the next e...