If you have to install an older version of a package, just specify it For example: npm install [email protected] You can also add the –save flag to that command to add it to your package.json dependencies, or –save –save-exact flags if you want that exact version specified in your package.json dependencies. The install command is … Read more
I need to install cv2 for a script that has been written for me. I tried pip install cv2 and pip install open_cv and got the same problem – a warning message from dist.py and complains about zlib being not found. No cv2 installed. I also tried pyopenvc and pip install opencv-python. So, I went … Read more
Another quicker way is: You don’t need to include –include-untracked if you don’t want to be thorough about it. After that, you can drop that stash with a git stash drop command if you like.
An nvarchar column can store any Unicode data. A varchar column is restricted to an 8-bit codepage. Some people think that varchar should be used because it takes up less space. I believe this is not the correct answer. Codepage incompatabilities are a pain, and Unicode is the cure for codepage problems. With cheap disk … Read more
The Inversion of Control (IoC) and Dependency Injection (DI) patterns are all about removing dependencies from your code. For example, say your application has a text editor component and you want to provide spell checking. Your standard code would look something like this: What we’ve done here creates a dependency between the TextEditor and the … Read more
This is caused when there is a class file that your code depends on and it is present at compile time but not found at runtime. Look for differences in your build time and runtime classpaths.
On some (especially older) platforms (see the comments below) you might need to and then include the necessary header file: and the value of pi can be accessed via: In my math.h (2014) it is defined as: but check your math.h for more. An extract from the “old” math.h (in 2009): However: on newer platforms … Read more
%<>% isn’t exported by dplyr (only %>% is). You need to load magrittr instead. Your reproducible example is running into a subtle magrittr bug, which causes the evaluation of pipeline expressions to search for some operators in magrittr’s scope, rather than in the calling scope. That way, x %<>% y %>% z, which evaluates as … Read more
Here’s how you would use a for loop;
I have two local git repositories, both pointing to the same remote repository. In one git repository, if I do git format-patch 1, how can I apply that patch to the other repository?