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Equivalent of “throw” in R
...does one "throw" an error in R? I have a function that takes a data frame and some column names and does stuff with them. If the columns don't exist, I want the function to stop and to stop all functions depending on it.
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Loop through files in a directory using PowerShell
...I change the following code to look at all the .log files in the directory and not just the one file?
4 Answers
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The relationship could not be changed because one or more of the foreign-key properties is non-nulla
I am getting this error when I GetById() on an entity and then set the collection of child entities to my new list which comes from the MVC view.
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Generate a random alphanumeric string in Cocoa
I want to call a method, pass it the length and have it generate a random alphanumeric string.
20 Answers
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How can I get browser to prompt to save password?
...ound a complete solution for this question. (I've tested this in Chrome 27 and Firefox 21).
There are two things to know:
Trigger 'Save password', and
Restore the saved username/password
1. Trigger 'Save password':
For Firefox 21, 'Save password' is triggered when it detects that there is a ...
Git submodule add: “a git directory is found locally” issue
...ually trying to learn how to use git, including the git submodule subcommands.
I already set up a server on which I can host, push and pull git repositories by using SSH.
I created a main git repository "Travail" on this server in which I would like to put all my projects as submodules.
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What is the difference between libsqlite3.dylib and libsqlite3.0.dylib?
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Thanks Jeff - I wasn't sure and didn't want to assume either way.
– earnshavian
Dec 2 '10 at 5:11
5
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const vs constexpr on variables
... = 3.141592653589793;
constexpr double PI2 = 3.141592653589793;
Both PI1 and PI2 are constant, meaning you can not modify them. However only PI2 is a compile-time constant. It shall be initialized at compile time. PI1 may be initialized at compile time or run time. Furthermore, only PI2 can be...
Is it possible to “decompile” a Windows .exe? Or at least view the Assembly?
A friend of mine downloaded some malware from Facebook, and I'm curious to see what it does without infecting myself. I know that you can't really decompile an .exe, but can I at least view it in Assembly or attach a debugger?
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Explanation of the UML arrows
I have recently been studying UML and drawing simple diagrams with ordinary plain arrows between classes, but I know it's not enough. There are plenty of other arrows: generalization, realisation and etc. which have meaning to the diagram reader.
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