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What does bundle exec rake mean?

... I have not used bundle exec much, but am setting it up now. I have had instances where the wrong rake was used and much time wasted tracking down the problem. This helps you avoid that. Here's how to set up RVM so you can use bundle exec by default within a specific project d...
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Undefined symbols for architecture arm64

...these files to be 64 bit compatible, that seems like a bit of overkill for now. EDIT: Some people also reported that setting Build For Active Architectures to YES was also necessary to solve this problem. As of 2014-04-28 the setting should look something like this: ...
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Set transparent background using ImageMagick and commandline prompt

... just the top-left corner. (There may be other things I'm forgetting right now). – hackerb9 Jul 4 '17 at 15:20 2
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How do I log a Python error with debug information?

...pplication does logging some other way – not using the logging module? Now, traceback could be used here. import traceback def log_traceback(ex, ex_traceback=None): if ex_traceback is None: ex_traceback = ex.__traceback__ tb_lines = [ line.rstrip('\n') for line in ...
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Python unittest - opposite of assertRaises?

...w an error when your function crashes, but not when an exception that you know it will throw given certain inputs gets thrown when given different inputs. – coredumperror Jan 9 '18 at 18:41 ...
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What exactly does += do in python?

I need to know what += does in python. It's that simple. I also would appreciate links to definitions of other short hand tools in python. ...
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How to add a custom button state

... +1 thanks a lot, Ted! Right now origin of the trouble has gone so I did not get to the actual implementation. However should my customer return to this again I will try the way you pointed me to. – Vit Khudenko Dec...
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Where does the “flatmap that s***” idiomatic expression in Scala come from?

... operation, so it cannot be as widely applied. Also, it requires too much knowledge about the data you are manipulating. Note: previously I said matching was slower than flatMap -- the opposite is true as a matter of fact, up to the most recent version of Scala at the time of this writing, 2.10.1.)...
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If a folder does not exist, create it

...er control in my application. I want to save a file in a specified folder. Now I want, if this folder does not exist, to first create it, and then save my file to this folder. If the folder already exists, then just save the file in it. ...
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How to resize an image to fit in the browser window?

... Thank you, solved now. If anybody have same problem (.svg file renders well, but renaming it to .html causes inaccuracy): browser automatically adds <body> tag with default margin:8 even if the file hasn't <body> tag. So solution i...