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How to do exponentiation in clojure?
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classic recursion (watch this, it blows stack)
(defn exp [x n]
(if (zero? n) 1
(* x (exp x (dec n)))))
tail recursion
(defn exp [x n]
(loop [acc 1 n n]
(if (zero? n) acc
(recur (* x acc) (dec n)))))
functional
(defn exp ...
What does the question mark operator mean in Ruby?
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It is a code style convention; it indicates that a method returns a boolean value.
The question mark is a valid character at the end of a method name.
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Is AsyncTask really conceptually flawed or am I just missing something?
I have investigated this problem for months now, came up with different solutions to it, which I am not happy with since they are all massive hacks. I still cannot believe that a class that flawed in design made it into the framework and no-one is talking about it, so I guess I just must be missing ...
How do you automatically set text box to Uppercase?
...at when the user starts typing in the text box for example railway , then it should be altered to capital letters like RAILWAY without the user having to press the Caps-lock button.
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How to Decrease Image Brightness in CSS
...s in CSS. I searched a lot but all I've got is about how to change the opacity, but that makes the image more bright.
can anyone help me ?
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Reverting to a specific commit based on commit id with Git? [duplicate]
With git log , I get a list of commits that I have made so far.
4 Answers
4
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How to find what code is run by a button or element in Chrome using Developer Tools
I'm using Chrome and my own website.
5 Answers
5
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Select N random elements from a List in C#
I need a quick algorithm to select 5 random elements from a generic list. For example, I'd like to get 5 random elements from a List<string> .
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pdftk compression option
...elated (lossless, but may display slightly differently):
gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/screen -dNOPAUSE -dBATCH -dQUIET -sOutputFile=output.pdf input.pdf
Edit: I just discovered another option (for lossless compression), which avoids the nasty gs command. qpdf is ...
Clearing purchases from iOS in-app purchase sandbox for a test user
...mail address, password, secret question, secret answer, date of birth, and iTunes store country. You can put exactly the same data (including password) for tester+01@gmail.com and tester+02@gmail.com and you will have two test accounts. Finally, in your tester@gmail.com inbox you will receive two ...