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class Course < ActiveRecord::Base
  mount_uploader :CourseData, CourseDataUploader
  
  validates :year, :name, :teacher, :grade, :category, :grade_id, :semester_id, :presence => true

  validates :CourseData, :presence => true

  belongs_to :grade

  belongs_to :semester

chichunchen

There is a Javascript interpreter in the JavaScriptCore framework that comes with OS X. The interpreter is called jsc and can be found at the following path:

/System/Library/Frameworks/JavaScriptCore.framework/Resources/jsc

There is a built-in function, quit(), which will exit interactive mode.

If you want to make it easier to use I suggest creating a symlink to a location in your path, e.g.:

sudo ln -s /System/Library/Frameworks/JavaScriptCore.framework/Resources/jsc /usr/bin

chichunchen

Download Link:
http://www.adakoda.com/adakoda/android/asm/

termainl:
brew install android-sdk
android update sdk --no-ui --filter 'platform-tools'

java -jar asm.jar

chichunchen

Re: How to compile OpenCL example in GCC?
Precisely, the kernel compilation in OpenCL is make in running time (library call). 

In Gcc, for compilation, you only need the headers (aviables on Kronos site). But for linkage, you have to install OpenCL compatible driver.

in the Makefile :
for Mac OSX : -framework OpenCL 
for Linux : -lOpenCL

chichunchen

#include <iostream>
#include <fstream>
#include <pthread.h>
using namespace std;

//----------------------------------------------------
/* Initialization */
//----------------------------------------------------

string filename[4]={"testdata1.txt", 

chichunchen

g++ <your_file.c> -framework GLUT -framework OpenGL 

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g++ m.cpp -o app `pkg-config --cflags --libs opencv`

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# Ignore all
*

# Unignore all with extensions
!*.*

# Unignore all dirs
!*/

### Above combination will ignore all files without extension ###

chichunchen

### INSTALLATION NOTES ###
# 1. Install Homebrew (https://github.com/mxcl/homebrew)
# 2. brew install zsh
# 3. Install OhMyZsh (https://github.com/robbyrussell/oh-my-zsh)
# 4. brew install reattach-to-user-namespace --wrap-pbcopy-pbpaste && brew link reattach-to-user-namespace
# 5. Install iTerm2
# 6. In iTerm2 preferences for your profile set:
#      Character Encoding: Unicode (UTF-8)
#      Report Terminal Type: xterm-256color
# 7. Put itunesartist and itunestrack into PATH

chichunchen

int* a = NULL;   // Pointer to int, initialize to nothing.
int n;           // Size needed for array
cin >> n;        // Read in the size
a = new int[n];  // Allocate n ints and save ptr in a.
for (int i=0; i<n; i++) {
    a[i] = 0;    // Initialize all elements to zero.
}
. . .  // Use a as a normal array
delete [] a;  // When done, free memory pointed to by a.
a = NULL;     // Clear a to prevent using invalid memory reference.