大约有 15,474 项符合查询结果（耗时：0.0434秒） [XML]
How do I cast a string to integer and have 0 in case of error in the cast with PostgreSQL?
... RETURN NULL;
END;
RETURN v_int_value;
END;
$$ LANGUAGE plpgsql;
Testing:
=# select convert_to_integer('1234');
convert_to_integer
--------------------
1234
(1 row)
=# select convert_to_integer('');
NOTICE: Invalid integer value: "". Returning NULL.
convert_to_integer...
Batch file include external file for variables
...ollowing a.bat:
@echo off
call b.bat
echo %MYVAR%
and b.bat:
set MYVAR=test
Running a.bat should generate output:
test
share
|
improve this answer
|
follow
...
Xcode: What is a target and scheme in plain language?
...ect has two targets, a "normal" build and an "office" build that has extra testing features and may contain several background music tracks and a button to change the track (as it currently does).
You'll be used to adding classes and resources to your default target as you add them.
You can pick and...
WPF OpenFileDialog with the MVVM pattern? [duplicate]
...
{
string OpenFileDialog(string defaultPath);
//Other similar untestable IO operations
Stream OpenFile(string path);
}
In your application, you would provide a default implementation of this service. Here is how you would consume it.
public MyViewModel : ViewModel
{
private ...
How to run a shell script at startup
...c/rc.d/
ln -s /etc/init.d/start_my_app /etc/rc.d/
Please note that on latest Debian, this will not work as your script have to be LSB compliant (provide, at least, the following actions: start, stop, restart, force-reload, and status):
https://wiki.debian.org/LSBInitScripts
As a note, you should...
How can I test what my readme.md file will look like before committing to github?
...ing a readme for my github project in the .md format. Is there a way can I test what my readme.md file will look like before committing to github?
...
Mock HttpContext.Current in Test Init Method
I'm trying to add unit testing to an ASP.NET MVC application I have built. In my unit tests I use the following code:
4 An...
RSpec: how to test if a method was called?
When writing RSpec tests, I find myself writing a lot of code that looks like this in order to ensure that a method was called during the execution of a test (for the sake of argument, let's just say I can't really interrogate the state of the object after the call because the operation the method p...
How to test if string exists in file with Bash?
... it is therefore advisable, for the sake of portability, to use logic that tests for this general condition instead of strict equality with 2.
To suppress the normal output from grep, you can redirect it to /dev/null. Note that standard error remains undirected, so any error messages that grep migh...
Calling pylab.savefig without display in ipython
...n and matplotlib.pylab in this regard. But, when I call pylab.savefig("test.png") the current figure get's displayed in addition to being saved in test.png . When automating the creation of a large set of plot files, this is often undesirable. Or in the situation that an intermediate file for ...