...ns within the group mutually exclusive. What you're looking for is subcommands. Instead of prog [ -a xxxx | [-b yyy -c zzz]], you'd have: prog command 1 -a: ... command 2 -b: ... -c: ... To invoke with the first set of arguments: prog command_1 -a xxxx To invoke with the sec...

I have a pandas data frame df like: 12 Answers 12 ...

... Only a handful of languages use a caret for 'power of', so if you don't want to call it arcos, please just type cos⁻¹. (If you're using a commercial operating system that makes it difficult to type exponents, I expect there would ...

...args -0 dos2unix Will recursively find all files inside current directory and call for these files dos2unix command share | improve this answer | follow | ...

... Unfortunately there is no perfect way, unless you use _proto_ recursively and access all non-enumerable properties, but this works in Firefox only. So the best I can do is to guess usage scenarios. 1) Fast and limited. Works when you have simple JSON-style objects without methods and DOM nodes...

... I've been looking into this problem further, and you simply need to grab all the appropriate DLL's from the same downloaded version of ODP.Net and put them in the same folder as your Exe file, because ODP.Net is fussy about not mixing version numbers. I've explained ho...

In class we are doing sorting algorithms and, although I understand them fine when talking about them and writing pseudocode, I am having problems writing actual code for them. ...

...ll files older than 7 days in a batch file. I've searched around the web, and found some examples with hundreds of lines of code, and others that required installing extra command line utilities to accomplish the task. ...

...the same placeholder hack). However, as described in another answer, from pandas 1.1 you have better control over this behavior, NA values are now allowed in the grouper using dropna=False share | i...

I want to return True if and only if 3 out of 4 boolean values are true. 27 Answers ...