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What is the difference between \r and \n?
How are \r and \n different? I think it has something to do with Unix vs. Windows vs. Mac, but I'm not sure exactly how they're different, and which to search for/match in regexes.
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Static function variables in Swift
...ment of the variable declaration determines the lexical scope (i.e. global vs within function vs many-nested-{}s). In Swift, storage scope always follows lexical scope, so you can't have a variable that's lexical to a function and that has global storage.
– rickster
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Efficient way to apply multiple filters to pandas DataFrame or Series
.... What is the performance benefit/trade off of passing in array via out() vs. using the one returned from logical_and()? Thanks again!
– durden2.0
Nov 29 '12 at 14:30
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AI2 SideBar Extension
...FontTypeface == default removed. Contents Download Usage Pixel vs. DIP Detect Swiping SideBar Structure SideBar Items Openening and Closing Reference Properties Functions Events Example SideBarTest Tools Download The UrsAI2SideBar ZIP archive for download. The archive contain...
Checking for a dirty index or untracked files with Git
...an error occurred” (exit non-zero, but probably 128). But checking for 0 vs. 1 vs. non-zero exit codes is probably fairly robust:
git ls-files --others --error-unmatch . >/dev/null 2>&1; ec=$?
if test "$ec" = 0; then
echo some untracked files
elif test "$ec" = 1; then
echo no un...
How can you diff two pipelines in Bash?
...ll more clearly remind you which input was which, by showing
-- /dev/stdin vs. ++ /dev/fd/63 or something, instead of two numbered fds.
Not even a named pipe will appear in the filesystem, at least on OSes where bash can implement process substitution by using filenames like /dev/fd/63 to get a f...
What is the difference between CMD and ENTRYPOINT in a Dockerfile?
...r. I think Docker documentation should add this under a section called CMD vs ENTRYPOINT.
– Tarik
Dec 28 '16 at 19:37
6
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Why is arr = [] faster than arr = new Array?
...here you know the size of the array ahead of time jsperf.com/square-braces-vs-new-array
– Y. Yoshii
Dec 10 '19 at 3:59
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Why does PHP 5.2+ disallow abstract static class methods?
...ented getSelectSQL() in all children.
– Artem Russakovskii
Jun 16 '09 at 0:21
1
Most likely, you ...
What is the difference between bottom-up and top-down?
...em anymore.)
[Previously, this answer made a statement about the top-down vs bottom-up terminology; there are clearly two main approaches called Memoization and Tabulation that may be in bijection with those terms (though not entirely). The general term most people use is still "Dynamic Programming...