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What's the difference between == and .equals in Scala?
...in Java" - depends on what exactly this is:
public static void main(final String... args) {
final double unboxedNaN = Double.NaN;
final Double boxedNaN = Double.valueOf(Double.NaN);
System.out.println(unboxedNaN == unboxedNaN);
System.out.println(boxedNaN == boxedNaN);
System.o...
Adding a regression line on a ggplot
...n <- function (fit) {
`require(ggplot2)
ggplot(fit$model, aes_string(x = names(fit$model)[2], y = names(fit$model)[1])) +
geom_point() +
stat_smooth(method = "lm", col = "red") +
labs(title = paste("Adj R2 = ",signif(summary(fit)$adj.r.squared, 5),
...
Get current stack trace in Ruby without raising an exception
.../tmp/caller.rb
def foo
puts caller # Kernel#caller returns an array of strings
end
def bar
foo
end
def baz
bar
end
baz
Output:
caller.rb:8:in `bar'
caller.rb:12:in `baz'
caller.rb:15:in `<main>'
shar...
Set margin size when converting from Markdown to PDF with pandoc
...or more complex specifications to be passed to the geometry LaTeX package, string options together as you would with LaTeX:
---
title: "Habits"
author: John Doe
date: March 22, 2005
geometry: "left=3cm,right=3cm,top=2cm,bottom=2cm"
output: pdf_document
---
Original answer
This is a LaTeX quest...
How do I check the difference, in seconds, between two dates?
...
# You could also pass datetime.time object in this part and convert it to string.
time_start = str('09:00:00')
time_end = str('18:00:00')
# Then get the difference here.
diff = datetime.strptime(time_end, date_format) - datetime.strptime(time_start, date_format)
# Get the time in hours i.e. ...
Math.random() versus Random.nextInt(int)
... }
}
}
}
public static void main(String[] args) {
long start = System.currentTimeMillis();
usingRandomClass();
long end = System.currentTimeMillis();
System.out.println("usingRandomClass " + (end - start));
start = Sys...
.bashrc/.profile is not loaded on new tmux session (or window) — why?
... ~/.bashrc.
default-command shell-command
The default is an empty string, which instructs tmux to create a login shell using the value of the default-shell option.
Init files for Bash,
login mode:
/etc/profile
~/.bash_profile, ~/.bash_login, ~/.profile (only first one that exists)
in...
Using helpers in model: how do I include helper dependencies?
...include anything, just use ActionController::Base.helpers.sanitize("On the string you want to sanitize")
– Edward
Apr 24 '12 at 10:45
...
How can I delete the current line in Emacs?
...u prefer delete instead of kill, you can use the
code below.
For point-to-string operation (kill/delete) I recommend to use zop-to-char
(defun aza-delete-line ()
"Delete from current position to end of line without pushing to `kill-ring'."
(interactive)
(delete-region (point) (line-end-posit...
Fragment transaction animation: slide in and slide out
...ution which I use:
public class CustomAnimator {
private static final String TAG = "com.example.CustomAnimator";
private static Stack<AnimationEntry> animation_stack = new Stack<>();
public static final int DIRECTION_LEFT = 1;
public static final in...