The following Java program takes on average between 0.50 secs and 0.55 secs to run: public static void main(String[] args) { long startTime = System.nanoTime(); int n = 0; for (int i = 0; i < 1000000000; i++) { n += 2 * (i * i); } System.out.println( (double) (System.nanoTime() - startTime) / 1000000000 + " s"); System.out.println("n = " + n); } If I replace 2 * (i * i) with 2 * i * i, it takes be
If I create a new rails 3 migration with (for example) rails g migration tester title:tester user:references , everything works fine...however if I add a column with something along the lines of: rails g migration add_user_to_tester user:references the reference field is not recognised. In short, the question is: how do I add a referencing column to a rails migration from the command line?
I'm attempting to re-install Ruby 1.9.3 with a patch that will allow me to use ruby-debug. When following the instructions and running rvm reinstall 1.9.3 --patch debug --force-autoconf It runs through and after applying the patch spits out: rvm requires autoreconf to install the selected ruby interpreter however autoreconf was not found in the PATH. Unfortunately, googling around for how to insta
Hi i get problem with xCode 4. I develope project with XCode4 on home and on work. And i store it on my USB flash drive. Today i get some problem. I open xib file for add outlet to code and get next error "Could not insert new outlet connection: Could not find any information for the class named ..." Class exist and property of xib file setted correctly. Could not insert new outlet connection: Cou
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