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Why should eval be avoided in Bash, and what should I use instead?

...g.' # Result in the same output (as long as $IFS has not been modified). Now say we want to add an option to redirect output as an argument to println. We could, of course, just redirect the output of println on each call, but for the sake of example, we're not going to do that. We'll need to us...
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How do RVM and rbenv actually work?

...d. Every Bash command that rbenv runs will be written to your terminal. Now, rbenv is just concerned with switching versions, but a thriving ecosystem of plugins will help you do everything from installing Ruby to setting up your environment, managing "gemsets" and even automating bundle exec. I...
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How to get the number of Characters in a String?

...o 1.3. And with CL 108985 (May 2018, for Go 1.11), len([]rune(string)) is now optimized. (Fixes issue 24923) The compiler detects len([]rune(string)) pattern automatically, and replaces it with for r := range s call. Adds a new runtime function to count runes in a string. Modifies the compiler to ...
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What is a Python egg?

...ust always be placed under the same parent directory. This allows what are now huge monolithic packages to be distributed as separate components.) They allow applications or libraries to specify the needed version of a library, so that you can e.g. require("Twisted-Internet>=2.0") before doing an...
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Git blame — prior commits?

... For example: git blame master -- index.html Full credit to Amber for knowing all the things! :) share | improve this answer | follow | ...
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jQuery UI accordion that keeps multiple sections open?

...been updated to support default active tabs option UPDATE: This plugin is now deprecated. share | improve this answer | follow | ...
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Undefined reference to `sin` [duplicate]

...NIX Specification". This history of this standard is interesting, and is known by many names (IEEE Std 1003.1, X/Open Portability Guide, POSIX, Spec 1170). This standard, specifically separates out the "Standard C library" routines from the "Standard C Mathematical Library" routines (page 277). ...
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Differences between Octave and MATLAB? [closed]

I'm a programmer who knows Python, Ruby and some C who is trying to decide whether to learn GNU Octave or Matlab. I know that they have a lot in common , but it isn't clear to me how similar the syntax is or even the data structures are. The above link shows several examples where they are syntacti...
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Haskell: Lists, Arrays, Vectors, Sequences

..." (putting objects at the end) than any pure linked list data structure I know of, although this is not a persistant data structure so less friendly than Haskell's lists. The third problem with lists is that they have poor space efficiency. Bunches of extra pointers push up your storage (by a cons...
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Should I hash the password before sending it to the server side?

... should be used in any authenticated session. There is really no need to know what an original password is. All that is required is a reliable way to generate (and reliably re-generate) an authentication "key" based on the original text chosen by the user. In an ideal world this text should immed...