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Remove columns from dataframe where ALL values are NA
...able(bd)
system.time({df1 <- bd[,colSums(is.na(bd) < nrow(bd))]})
# error -- can't allocate vector of size ...
system.time({df2 <- bd[, !apply(is.na(bd), 2, all)]})
# error -- can't allocate vector of size ...
system.time({df3 <- Filter(function(x)!all(is.na(x)), bd)})
## user system e...
How do you find the row count for all your tables in Postgres
I'm looking for a way to find the row count for all my tables in Postgres. I know I can do this one table at a time with:
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Default value in Doctrine
...lso do: options={"default": 0} Be careful to use " and not ', as it causes errors in my version of doctrine.
– Scott Flack
Jun 17 '14 at 7:37
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Datatables - Search Box outside datatable
...red to be able to call .search on it (if will throw a "function undefined" error otherwise). See: datatables.net/faqs/#api
– Lionel
Mar 30 '15 at 7:28
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What exactly is Spring Framework for? [closed]
I hear a lot about Spring , people are saying all over the web that Spring is a good framework for web development. What exactly is Spring Framework for?
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How can I prevent the textarea from stretching beyond his parent DIV element? (google-chrome issue o
How can I prevent the textarea from stretching beyond its parent DIV element?
4 Answers
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How do I return multiple values from a function in C?
...ink it depends more on how related the return values are. If the int is an error code and the string is a result, then these should not be put together in a struct. That's just silly. In that case, I would return the int and pass the string as a char * and a size_t for the length unless it's absolut...
I change the capitalization of a directory and Git doesn't seem to pick up on it
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That fatal error means you do not have a GIT repository at that location. git commands only work in directories with GIT repositories.
– David Manpearl
Sep 8 '15 at 18:43
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release Selenium chromedriver.exe from memory
...se all open windows. But chromedriver.exe was not exited. And there was an error message ' InvalidURL: nonnumeric port: 'port''.
– KLI
Jan 24 '14 at 14:57
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How to show popup message like in Stack Overflow
...e popup messages.
var showNotification=function(jClicked,msg){master.showErrorPopup(jClicked.parent(),msg)};
var showFadingNotification=function(jClicked,msg){master.showErrorPopup(jClicked.parent(),msg,true)};
//master...
showErrorPopup: function (e, h, f) {
var g = $('<div class="error-n...