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arrayfun can be significantly slower than an explicit loop in matlab. Why?
...n2 10.392475 seconds.
Soln3 0.239023 seconds.
Oli 0.010672 seconds.
Now, while the fully 'vectorized' solution is clearly the fastest, you can see that defining a function to be called for every x entry is a huge overhead. Just explicitly writing out the computation got us factor 5 speedup. I...
Sharing link on WhatsApp from mobile website (not application) for Android
...ebsite and seems to work on latest Android with latest chrome and whatsapp now too! Give the link a new shot!
<a href="whatsapp://send?text=The text to share!" data-action="share/whatsapp/share">Share via Whatsapp</a>
Rechecked it today (17th April 2015):
Works for me on iOS 8 (iPhone...
How can I disable logging of asset pipeline (sprockets) messages in Ruby on Rails 3.1?
... end
alias_method_chain :call, :quiet_assets
end
end
Updated: It now works for Ruby on Rails 3.2 too (previous attempt fixes before_dispatch, and now we're going for the root rack call instead)
Update: A proper Rack middleware solution (instead of fragile alias_method_chain) from @macour...
How do I show the value of a #define at compile-time?
...
I know that this is a long time after the original query, but this may still be useful.
This can be done in GCC using the stringify operator "#", but it requires two stages.
#define XSTR(x) STR(x)
#define STR(x) #x
The value...
How to profile a bash shell script slow startup?
...2 2> >(tee /tmp/sample-time.$$.log |
sed -u 's/^.*$/now/' |
date -f - +%s.%N >/tmp/sample-time.$$.tim)
set -x
Doing this will run date only once. There is a quick demo/test to show how it work:
for i in {1..4};do echo now;sleep .05;done| date -f - +%N
...
Handling file renames in git
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In git 1.9.1 git status now behaves like git commit.
– Jacques René Mesrine
Oct 5 '15 at 16:11
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What's the shebang/hashbang (#!) in Facebook and new Twitter URLs for?
...ve just noticed that the long, convoluted Facebook URLs that we're used to now look like this:
7 Answers
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foreach vs someList.ForEach(){}
.... e.g. a block of code for reading rows from a dataReader.
I still don't know exactly why they did this.
The drawbacks of list.ForEach() are:
It is more verbose in C# 2.0. However, in C# 3 onwards, you can use the "=>" syntax to make some nicely terse expressions.
It is less familiar. People ...
Intel HAXM installation error - This computer does not support Intel Virtualization Technology (VT-x
...yper-V and Windows Hypervisor Platform options and restart your system.
Now, you can Start HAXM installation without any error.
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What is the use of ObservableCollection in .net?
...ed,
INotifyPropertyChanged
As such it is very useful when you want to know when the collection has changed. An event is triggered that will tell the user what entries have been added/removed or moved.
More importantly they are very useful when using databinding on a form.
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