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How to test an Internet connection with bash?
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Careful now!" cat /sys/class/net/wwan0/carrier does not work on ubuntu 14.04 LTS.
– dotnetCarpenter
Mar 1 '15 at 20:45
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Extract a dplyr tbl column as a vector
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@mzuba I would use the pull command now. My solution was written prior to dplyr version 0.6.
– rrs
Jun 20 '18 at 13:12
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Can't find the PostgreSQL client library (libpq)
...hat worked for me. I've been trying to resolve this issue for an hour plus now, and this code is what did it - ARCHFLAGS="-arch x86_64" bundle install
– piratetone
Apr 5 '16 at 22:40
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PHP array delete by value (not key)
...nt) instead. No biggie, but just wanted anyone who had a similar issue to know that they weren't alone
– Angad
Aug 26 '13 at 14:11
8
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Remove columns from dataframe where ALL values are NA
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dplyr now has a select_if verb that may be helpful here:
library(dplyr)
temp <- data.frame(x = 1:5, y = c(1,2,NA,4, 5), z = rep(NA, 5))
not_all_na <- function(x) any(!is.na(x))
not_any_na <- function(x) all(!is.na(x))
&g...
What is the significance of 1/1/1753 in SQL Server?
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@Venkat - fixed now with an internet archive link
– Martin Smith
Apr 26 at 10:54
add a comment
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What is an MDF file? [closed]
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SQL Server databases use two files - an MDF file, known as the primary database file, which contains the schema and data, and a LDF file, which contains the logs. See wikipedia. A database may also use secondary database file, which normally uses a .ndf extension.
As John S....
Mongoose.js: Find user by username LIKE value
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works fine.. now i got a problem.. It only have to find peter if the var is peter. But if i set the var to 'p' it will still find peter.
– PeterBechP
Mar 22 '12 at 15:01
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Python String and Integer concatenation [duplicate]
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@RogerFan, yeah right! Don't know, how my answer got this many upvotes o_o Didn't expect this!
– Anirban Nag 'tintinmj'
Aug 5 '16 at 20:25
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Convert a 1D array to a 2D array in numpy
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Can you explain how your answer now is different from the previous and also the other answers above, that also uses np.reshape?
– StupidWolf
Nov 25 '19 at 16:24
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