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Why are elementwise additions much faster in separate loops than in a combined loop?
...auses false aliasing stalls in the processor load/store units.
However, in order for false aliasing to occur, there must be a large enough stride between the datasets. This is why you don't see this in region 3.
Region 5:
At this point, nothing fits in the cache. So you're bound by memory bandwidth....
Abusing the algebra of algebraic data types - why does this work?
...to the "inhabitants" of a type (i.e., distinct values having that type) in order to demonstrate the algebraic behavior. To make that perspective explicit:
The product type (A, B) represents a value each from A and B, taken independently. So for any fixed value a :: A, there is one value of type (A...
Looping over arrays, printing both index and value
...
INDEX=0
for i in $list; do
echo ${INDEX}_$i
let INDEX=${INDEX}+1
done
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Various ways to remove local Git changes
...# Discarding all local commits on this branch [Removing local commits]
In order to discard all local commits on this branch, to make the local branch identical to the "upstream" of this branch, simply run
git reset --hard @{u}
Reference: http://sethrobertson.github.io/GitFixUm/fixup.html
or do ...
Filter LogCat to get only the messages from My Application in Android?
...can do: adb logcat | findstr com.example.package
– jj_
Oct 31 '15 at 2:25
8
Just a minor change t...
Get the index of the object inside an array, matching a condition
...ave some kind of hidden iteration, with lodash this becomes:
var index = _.findIndex(array, {prop2: 'yutu'})
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What Android tools and methods work best to find memory/resource leaks? [closed]
...ns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/RootView"
>
...
Then, on the onDestroy() method of your Activity, call the unbindDrawables() method passing a refence to the ...
How to format a number as percentage in R?
...s pointed out by @DzimitryM, percent() has been "retired" in favor of label_percent(), which is a synonym for the old percent_format() function.
label_percent() returns a function, so to use it, you need an extra pair of parentheses.
library(scales)
x <- c(-1, 0, 0.1, 0.555555, 1, 100)
label_pe...
Converting RGB to grayscale/intensity
...evious similar question. It is very helpful:
http://cadik.posvete.cz/color_to_gray_evaluation/
It shows 'tons' of different methods to generate grayscale images with different outcomes!
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How do I move a redis database from one server to another?
... load a start up? My redis config has dbfilename set to /var/db/redis/redis_state.rdb ... is this the filename I use in place of "dump.rdb"?
– Mojo
Mar 23 '12 at 18:29
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