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switch() statement usage
...ue again. It seems switch is generally faster than if statements.
So that, and the fact that the code is shorter/neater with a switch statement leans in favor of switch:
# Simplified to only measure the overhead of switch vs if
test1 <- function(type) {
switch(type,
mean = 1,
m...
When is localStorage cleared?
...rs.com/blog/2012/09/10/clearing-browser-data for browser specific cleaning and how to do it.
– Julien Kronegg
Dec 20 '12 at 7:26
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Python OpenCV2 (cv2) wrapper to get image size?
...
cv2 uses numpy for manipulating images, so the proper and best way to get the size of an image is using numpy.shape. Assuming you are working with BGR images, here is an example:
>>> import numpy as np
>>> import cv2
>>> img = cv2.imread('foo.jpg')
&g...
Remove data.frame row names when using xtable
OK, I admit this one is a bit uptight (read: "stupid"), and I assume it's quite easy too. I'm writing a report and I want to use xtable package for LaTeX table generation (note that memisc package does the job, but say I want to do this solely with xtable ).
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CMake: Project structure with unit tests
...tructure my project to include the production sources (in src subfolder) and tests (in test subfolder). I am using CMake to build this. As a minimal example I have the following files:
...
What's the difference between hard and soft floating point numbers?
... architecture" This can make sense for a library to be machine-independent and bit-exact (soft float) in accuracy-critical parts and fast (hard float) in parts where small deviations don't matter.
– PhilLab
May 29 '17 at 12:18
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What is a patch in git version control?
I am new to both git and version control so I am trying to figure out what a patch is and how is it different from the rest of activities I do in git?
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Getting rid of all the rounded corners in Twitter Bootstrap
...-border-radius: 0 !important; border-radius: 0 !important; } And it is working perfectly for Bootstrap 3.2. Thanx for the fix man!
– Todor Todorov
Feb 7 '15 at 9:30
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How to Get Element By Class in JavaScript?
...he way it works is by looping through all of the elements in the document, and searching their class list for matchClass. If a match is found, the contents is replaced.
jsFiddle Example, using Vanilla JS (i.e. no framework)
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`levels
...answers here are good, but they are missing an important point. Let me try and describe it.
R is a functional language and does not like to mutate its objects. But it does allow assignment statements, using replacement functions:
levels(x) <- y
is equivalent to
x <- `levels<-`(x, y)
...