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How do I diff the same file between two different commits on the same branch?
In Git, how could I compare the same file between two different commits (not contiguous) on the same branch (master for example)?
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What does “O(1) access time” mean?
... like 14 nanoseconds, or three minutes no matter the amount of data in the set.
O(n) means it takes an amount of time linear with the size of the set, so a set twice the size will take twice the time. You probably don't want to put a million objects into one of these.
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How to create a circular ImageView in Android? [duplicate]
...e;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;
public class RoundedImageView extends ImageView {
public RoundedImageView(Context context) {
super(context);
}
public RoundedImageView(Context context, AttributeSet...
Capturing Groups From a Grep RegEx
...ve got this little script in sh (Mac OSX 10.6) to look through an array of files. Google has stopped being helpful at this point:
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pull out p-values and r-squared from a linear regression
How do you pull out the p-value (for the significance of the coefficient of the single explanatory variable being non-zero) and R-squared value from a simple linear regression model? For example...
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How to remove “index.php” in codeigniter's path
... to the beginning of the RewriteCond. RewriteCond $1 !^\/(index\.php|assets|robots\.txt)
– Henry
Sep 8 '13 at 18:21
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What's the fastest way to merge/join data.frames in R?
...eSQL databases as well.
library(plyr)
library(data.table)
library(sqldf)
set.seed(123)
N <- 1e5
d1 <- data.frame(x=sample(N,N), y1=rnorm(N))
d2 <- data.frame(x=sample(N,N), y2=rnorm(N))
g1 <- sample(1:1000, N, replace = TRUE)
g2<- sample(1:1000, N, replace = TRUE)
d <- data.fram...
Histogram using gnuplot?
...ooth freq to see why the above makes a histogram
to deal with ranges just set the xrange variable.
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Ruby - test for array
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You probably want to use kind_of().
>> s = "something"
=> "something"
>> s.kind_of?(Array)
=> false
>> s = ["something", "else"]
=> ["something", "else"]
>> s.kind_of?(Array)
=> true
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How do I apply a perspective transform to a UIView?
...g, so I can't explain exactly why this works, but it does. You'll need to set this value to a negative fraction for your initial transform, then apply your layer rotation transforms to that. You should also be able to do the following:
Objective-C
UIView *myView = [[self subviews] objectAtIndex:...