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How to detect the physical connected state of a network cable/connector?
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The errors about directories from grep can be ignored with: grep -s "" eth0/*
– mrtumnus
Jul 25 '18 at 0:37
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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...
Gradle does not find tools.jar
...Files\Java\jre8\bin. If we look in there, there is no Tools.jar, hence the error.
You need to find where the JDK is, in my case: D:\Program Files\Java\jdk1.8.0_11, and if you look in the lib directory, you will see Tools.jar.
What I did I created a new environment variable JAVA_HOME:
And then y...
Using Node.js only vs. using Node.js with Apache/Nginx
...t Sergeant mentioned in his answer, you can more easily display meaningful error pages or fall back onto a static site if your node service crashes. Otherwise users may just get a timed out connection.
Running another web server in front of Node may help to mitigate security flaws and DoS attacks ag...
Numbering rows within groups in a data frame
...hanks! The dplyr solution is good. But if, like me, you kept getting weird errors when trying this approach, make sure that you are not getting conflicts between plyr and dplyr as explained in this post It can be avoided by explicitly calling dplyr::mutate(...)
– EcologyTom
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How do you add a Dictionary of items into another Dictionary
...return, you're already mutating left. Edit: actually, even though I get no errors, I think @assignment should stay.
– Roland
Jun 9 '14 at 12:02
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Django : How can I see a list of urlpatterns?
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All I get from that is TypeError: unsupported operand type(s) for +: 'NoneType' and 'str'
– Paul Tomblin
Dec 13 '13 at 20:04
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Retain precision with double in Java
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ViralShah: It also potentially introduces floating-point error when dealing with mathematical operations. Given that the point of this exercise is to avoid exactly that, it seems prudent to alter it.
– Samir Talwar
Mar 18 '10 at 9:00
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How do I escape a single quote ( ' ) in JavaScript? [duplicate]
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Alright. I made a user error... Put in in the wrong spot.
– Matthew
Apr 21 '13 at 19:06
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Android Studio - How to increase Allocated Heap Size
... Changed both options (vmoptions and _JAVA_OPTIONS) but I still have the error
– Raphael Royer-Rivard
Dec 2 '14 at 19:37
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