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Convert RGB to RGBA over white
... input values and r', g', b', and a' be the output values, all scaled (for now, as it makes the math prettier) between 1 and 0. Then, by the formula for overlaying colors:
r = a' * r' + 1 - a'
g = a' * g' + 1 - a'
b = a' * b' + 1 - a'
The 1 - a' terms represent the background contribution, and th...
Differences between Java 8 Date Time API (java.time) and Joda-Time
I know there are questions relating to java.util.Date and Joda-Time. But after some digging, I couldn't find a thread about the differences between the java.time API (new in Java 8 , defined by JSR 310 ) and Joda-Time .
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How enable auto-format code for Intellij IDEA?
... select ok.
Use macro. Go to
Edit> Macros> Start Macro Recording.
Now press semicolon and keyboard shortcut to reformat code (you can find the keyboard shortcut from other answers or from settings > keymap).
After doing reformat go to
Edit> Macros> Stop Macro Recording
Save the ...
What is the correct way to get a subarray in Scala?
...ColumnB", "ColumnC")
val columns_original = original_array(0)
for (column_now <- columns_subset) {
sub_array += original_array.map{_(columns_original.indexOf(column_now))}
}
sub_array
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Is MATLAB OOP slow or am I doing something wrong?
...nk the upshot of this is that:
MCOS/classdef methods are faster. Cost is now about on par with old style classes, as long as you use the foo(obj) syntax. So method speed is no longer a reason to stick with old style classes in most cases. (Kudos, MathWorks!)
Putting functions in namespaces makes t...
What are the benefits of using C# vs F# or F# vs C#? [closed]
...uld probably be some people who disagree with this since it's "cool" right now to "prove" how easy it is to do anything in F#, but I stand by it). There are countless others.
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Types in MySQL: BigInt(20) vs Int(20)
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` it affects only the ZEROFILL option:` now my curiosity ends
– Umair Ayub
Jul 5 '16 at 10:42
6
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Storing time-series data, relational or non?
...s to the disk space used.
You can get rid of it. Please.
Elevation
Now that you have removed the impediment, you may not have recognised it, but your table is in Sixth Normal Form. Very high speed, with just one Index on the PK. For understanding, read this answer from the What is Sixth Nor...
Styling text input caret
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In CSS3, there is now a native way to do this, without any of the hacks suggested in the existing answers: the caret-color property.
There are a lot of things you can do to with the caret, as seen below. It can even be animated.
/* Keyword v...
How do I add a library project to Android Studio?
... dependency. It won’t mess in your project structure. Almost every well-known Android library is available in a Maven repository and its installation takes only one line of code in the app/build.gradle file:
dependencies {
compile 'com.jakewharton:butterknife:6.0.0'
}
Adding the library
H...