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How to drop columns by name in a data frame

... 389 You should use either indexing or the subset function. For example : R> df <- data.frame...
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What does the C++ standard state the size of int, long type to be?

...s the number of bits in a byte. In all but the most obscure platforms it's 8, and it can't be less than 8. One additional constraint for char is that its size is always 1 byte, or CHAR_BIT bits (hence the name). This is stated explicitly in the standard. The C standard is a normative reference for t...
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TINYTEXT, TEXT, MEDIUMTEXT, and LONGTEXT maximum storage sizes

... From the documentation (MySQL 8) : Type | Maximum length -----------+------------------------------------- TINYTEXT | 255 (2 81) bytes TEXT | 65,535 (216−1) bytes = 64 KiB MEDIUMTEXT | 16,777,215 (224−1) bytes = ...
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pandas: filter rows of DataFrame with operator chaining

... 398 I'm not entirely sure what you want, and your last line of code does not help either, but anyway...
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How is it possible to declare nothing inside main() in C++ and yet have a working application after

... answered Jul 8 '13 at 15:17 NawazNawaz 316k9999 gold badges611611 silver badges799799 bronze badges ...
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How to get terminal's Character Encoding

... change my gnome-terminal's character encoding to "GBK" (default it is UTF-8), but how can I get the value(character encoding) in my Linux? ...
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What does this square bracket and parenthesis bracket notation mean [first1,last1)?

... answered Dec 9 '10 at 8:41 Michael MrozekMichael Mrozek 141k2424 gold badges151151 silver badges159159 bronze badges ...
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How many bytes in a JavaScript string?

...vascript string which is about 500K when being sent from the server in UTF-8. How can I tell its size in JavaScript? 13 Ans...
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How to delete last item in list?

... answered Aug 11 '13 at 8:10 sebastiansebastian 3,29022 gold badges1717 silver badges2121 bronze badges ...
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Using awk to print all columns from the nth to the last

... | edited Apr 8 '15 at 13:01 fedorqui 'SO stop harming' 212k7373 gold badges432432 silver badges485485 bronze badges ...