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Linux delete file with size 0 [duplicate]
How do I delete a certain file in linux if its size is 0. I want to execute this in an crontab without any extra script.
8 ...
What are some compelling use cases for dependent method types?
...type Edge
def end1(e: Edge): Node
def end2(e: Edge): Node
def nodes: Set[Node]
def edges: Set[Edge]
}
Somewhere else we can statically guarantee that we aren't mixing up nodes from two different graphs, e.g.:
def shortestPath(g: Graph)(n1: g.Node, n2: g.Node) = ...
Of course, this alr...
Rebase feature branch onto another feature branch
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How to read data when some numbers contain commas as thousand separator?
...First create a new class definition, then create a conversion function and set it as an "as" method using the setAs function like so:
setClass("num.with.commas")
setAs("character", "num.with.commas",
function(from) as.numeric(gsub(",", "", from) ) )
Then run read.csv like:
DF <- read...
Remove columns from dataframe where ALL values are NA
... has arbitrary properties as columns and each row represents one data set .
12 Answers
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Aligning rotated xticklabels with their respective xticks
...
You can set the horizontal alignment of ticklabels, see the example below. If you imagine a rectangular box around the rotated label, which side of the rectangle do you want to be aligned with the tickpoint?
Given your description, ...
How would you implement an LRU cache in Java?
Please don't say EHCache or OSCache, etc. Assume for purposes of this question that I want to implement my own using just the SDK (learning by doing). Given that the cache will be used in a multithreaded environment, which datastructures would you use? I've already implemented one using LinkedHashM...
Finding all possible combinations of numbers to reach a given sum
...d you go about testing all possible combinations of additions from a given set N of numbers so they add up to a given final number?
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How do I vertically center text with CSS? [duplicate]
.../div>
It only works for a single line of text though, because we set the line's height to the same height as the containing box element.
A more versatile approach
This is another way to align text vertically. This solution will work for a single line and multiple lines of text, but it ...
Suppress command line output
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