大约有 43,000 项符合查询结果（耗时：0.0573秒） [XML]
Bash variable scope
...he while loop.
Now this child process has its own copy of the environment and can't pass any
variables back to its parent (as in any unix process).
Therefore you'll need to restructure so that you're not piping into the loop.
Alternatively you could run in a function, for example, and echo the val...
Django - Difference between import django.conf.settings and import settings
...ings file. django.conf.settings abstracts the concepts of default settings and site-specific settings; it presents a single interface. It also decouples the code that uses settings from the location of your settings.
UPDATE: if you want to define some own settings, see this part of the documentati...
Backwards migration with Django South
Ok, so this seems like a really silly thing to ask, and I'm sure I'm missing something somewhere.
3 Answers
...
The ALTER TABLE statement conflicted with the FOREIGN KEY constraint
...u tried to create a foreign key from tblDomare.PersNR to tblBana.BanNR but/and the values in tblDomare.PersNR didn't match with any of the values in tblBana.BanNR. You cannot create a relation which violates referential integrity.
...
How to run test cases in a specified file?
...
There are two ways. The easy one is to use the -run flag and provide a pattern matching names of the tests you want to run.
Example:
$ go test -run NameOfTest
See the docs for more info.
The other way is to name the specific file, containing the tests you want to run:
$ go te...
python numpy machine epsilon
I am trying to understand what is machine epsilon. According to the Wikipedia, it can be calculated as follows:
3 Answers
...
Determining type of an object in ruby
...he object, it returns its class. The name should be a dead giveaway. Class and Type are two completely different concepts in OO.
– Jörg W Mittag
Apr 2 '13 at 22:57
80
...
T-SQL - function with default parameters
...trated. I am not getting advantage of default concept here... I need to go and change all the places now.
– LCJ
Sep 12 '14 at 20:26
8
...
How to set Sqlite3 to be case insensitive when string comparing?
...ocase in the column definition (the other options are binary (the default) and rtrim; see here). You can specify collate nocase when you create an index as well. For example:
create table Test
(
Text_Value text collate nocase
);
insert into Test values ('A');
insert into Test values ('b');
i...
Retrieving the COM class factory for component with CLSID {XXXX} failed due to the following error:
...Compile->Advanced Compile Options...' (at the bottom of the window tab) and then 'Target CPU' (x86)
– Rodolfo
Jun 27 '11 at 15:56
1
...