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How to read data when some numbers contain commas as thousand separator?
...ou can have read.table or read.csv do this conversion for you semi-automatically. 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...
Reading specific lines only
...lines]
this accepts any open file-like object thefile (leaving up to the caller whether it should be opened from a disk file, or via e.g a socket, or other file-like stream) and a set of zero-based line indices whatlines, and returns a list, with low memory footprint and reasonable speed. If the ...
Ruby: require vs require_relative - best practice to workaround running in both Ruby =1.
...Kernel
def require_relative(path)
require File.join(File.dirname(caller[0]), path.to_str)
end
end
end
This allows you to use require_relative as you would in ruby 1.9.2 in ruby 1.8 and 1.9.1.
share
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How do I know if a generator is empty from the start?
...
It's bad because the moment you call next(generator, None) you will skip 1 item if it is available
– Nathan Do
Nov 30 '16 at 8:06
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How to get the difference between two arrays in JavaScript?
...
Computing the Array difference is a so called set operation, because property lookup is the very own job of Sets, which are orders of magnitude faster then indexOf/includes. Simply put, your solution is very inefficient and rather slow.
– use...
Chrome says “Resource interpreted as script but transferred with MIME type text/plain.”, what gives?
... me to become aware of your changes. I have reverted your changes, which I call fudging, to the answers to this question where I consider them inappropriate.
– PointedEars
May 27 '15 at 22:43
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Can we instantiate an abstract class?
... can read about the complete procedure on the link I provided.
To practically see that the class being instantiated is an Anonymous SubClass, you just need to compile both your classes. Suppose you put those classes in two different files:
My.java:
abstract class My {
public void myMethod()...
Is it possible to create a multi-line string variable in a Makefile
...HELL) -c "echo '$(MSG)'" | sed -e 's/^ //'
=====
You can also use Gnu's callable macros:
=====
MSG = this is a\\n\
multi-line\\n\
message
method1:
@echo "Method 1:"
@$(SHELL) -c "echo '$(MSG)'" | sed -e 's/^ //'
@echo "---"
SHOW = $(SHELL) -c "echo '$1'" | sed -e 's/^ ...
NUnit Test Run Order
By default nunit tests run alphabetically. Does anyone know of any way to set the execution order? Does an attribute exist for this?
...
Java 8 Streams: multiple filters vs. complex condition
...le filter invocation using a lambda expression with &&.
But, as said, this kind of overhead will be eliminated by the HotSpot optimizer and is negligible.
In theory, two filters could be easier parallelized than a single filter but that’s only relevant for rather computational intense ta...