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What is Bit Masking?
...lying the mask to the value means that we want to clear the first (higher) 4 bits, and keep the last (lower) 4 bits. Thus we have extracted the lower 4 bits. The result is:
Mask: 00001111b
Value: 01010101b
Result: 00000101b
Masking is implemented using AND, so in C we get:
uint8_t stuff(...) ...
Measuring code execution time
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edited Apr 2 '19 at 14:30
Sebastian Brosch
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How to prevent line break at hyphens on all browsers
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– derekerdmann
Jan 6 '12 at 14:29
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What size should apple-touch-icon.png be for iPad and iPhone?
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146
Updated list December 2019, iOS13
One icon for iOS 180x180 px and one for android 192x192 px (d...
Max length UITextField
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edited May 7 '19 at 23:24
answered Aug 10 '14 at 0:13
Ima...
How to decide font color in white or black depending on background color?
...and choose the corresponding text.
if (red*0.299 + green*0.587 + blue*0.114) > 186 use #000000 else use #ffffff
The threshold of 186 is based on theory, but can be adjusted to taste. Based on the comments below a threshold of 150 may work better for you.
Edit: The above is simple and works re...
How do I create a comma-separated list from an array in PHP?
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answered Mar 12 '10 at 19:24
ryeguyryeguy
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How to get random value out of an array?
I have an array called $ran = array(1,2,3,4);
20 Answers
20
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Linear Regression and group by in R
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49
Here's one way using the lme4 package.
library(lme4)
d <- data.frame(state=rep(c('NY', 'C...
Java switch statement: Constant expression required, but it IS constant
...essions for the specification of a constant expression1. This refers to §4.12.4 Final Variables which defines a "constant variable" as follows:
We call a variable, of primitive type or type String, that is final and initialized with a compile-time constant expression (§15.28) a constant varia...