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Pandas every nth row
...ing from 0
This arithmetic based sampling has the ability to enable even more complex row-selections.
This assumes, of course, that you have an index column of ordered, consecutive, integers starting at 0.
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Print a file, skipping the first X lines, in Bash [duplicate]
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121
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How to hash some string with sha256 in Java?
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177
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How can I comment a single line in XML?
...efore use (can be part of a singe-step build process). It makes for a much more convenient way of using comments. (I have used this technique with WiX source (installer tool for Windows). A number of other steps were required for building the installer, so this was just one more step to add to a bui...
Merge two Git repositories without breaking file history
...get and that helps Git line everything up correctly.
I wrote up a slightly more detailed explanation here.
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Checking if a string can be converted to float in Python
... fail a match at the same speed as above, but will succeed faster. Also, a more correct way would be: "^[+-]?\d(>?\.\d+)?$" However, that still doesn't match numbers like: +1.0e-10
– John Gietzen
Apr 9 '09 at 22:25
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ASP.NET MVC - Set custom IIdentity or IPrincipal
...tion, I want to set a custom IIdentity / IPrincipal. Whichever is easier / more suitable. I want to extend the default so that I can call something like User.Identity.Id and User.Identity.Role . Nothing fancy, just some extra properties.
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How does “cat
...nto stdin. See https://en.wikipedia.org/wiki/Here_document#Unix_shells for more details.
From man bash:
Here Documents
This type of redirection instructs the shell to read input from
the current source until a line
containing only word (with no trailing
blanks) is seen.
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Difference between JOIN and INNER JOIN
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It's ANSI SQL standard. See more: contrib.andrew.cmu.edu/~shadow/sql/sql1992.txt; en.wikipedia.org/wiki/SQL-92
– Indian
Jan 26 '18 at 10:14
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What is the difference between MOV and LEA?
...except in 64-bit mode for RIP-relative addressing. mov r32, imm32 runs on more ports. lea eax, [edx*4] is a copy-and-shift which can't be done in one instruction otherwise, but in the same register LEA just takes more bytes to encode because [eax*4] requires a disp32=0. (It runs on different port...