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Delete all but the most recent X files in bash
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For the record, here's the explanation for why it's generally not a good idea to parse ls output: http://mywiki.wooledge.org/ParsingLs
ls -tp | grep -v '/$' | tail -n +6 | xargs -I {} rm -- {}
The above is inefficient, because xargs has to invoke rm once for each filename.
Your platform's xargs...
Thou shalt not inherit from std::vector
...at the compiler usually generates. This does not make it safe nor a great idea to do.
– Yakk - Adam Nevraumont
Jun 11 '19 at 17:18
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Why use the INCLUDE clause when creating an index?
...) turns out to make no performance-difference - you might want to skip the idea of adding them:) Verify that they are useful!
The average number of rows per same values in keys (id1, id2 ... idN) can be of some importance as well.
Notice that if a column - that is added as an included-column of i...
How do I reword the very first git commit message?
...ng any commit that's considered to be "published history" is usually a bad idea. In your case, that would mean that you generally shouldn't do this if anyone else would ever have been working on a commit that had your root commit as an ancestor.
– Mark Longair
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How can I edit a view using phpMyAdmin 3.2.4?
...W my_view_name in the sql portion of phpmyadmin and you will have a better idea of what is inside the view
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How to generate a core dump in Linux on a segmentation fault?
...cute little 17 GB core file (on a 25 GB partition). It's definitely a good idea to keep the core file's size limited :)
– IceCool
Sep 8 '13 at 15:48
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What's the difference between lists and tuples?
...because a tuple is already supposed to have structure. This underlines the idea that tuples are a light-weight alternative to classes and instances.
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PHP random string generator
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@FranciscoPresencia do you have any idea how horrifically inefficient that is? You are checking the length of a string twice per iteration! The strlen inside the loop should be cached in a variable before entering the loop as well.
– devel...
How to show math equations in general github's markdown(not github's blog)
...line items use HTML ampersand entity codes. An example that combines this idea with subscript text in markdown is: hθ(x) = θo x + θ1x, the code for which follows.
h<sub>&theta;</sub>(x) = &theta;<sub>o</sub> x + &theta;<sub>1</sub>x
HTML amp...
Dynamic constant assignment
... mis-steps -- these should either be fully immutable, or dump the constant idea altogether. From a coder's perspective, a constant is declarative and intentional, a signal to other that "this value is truly unchangeable once declared/assigned."
But sometimes an "obvious declaration" actually forec...