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# Python 2.7
# 1. Iterator
def f(n):
    return [x**4 for x in range(n)]

def f2(n):
    for x in range(n):
        yield x**3
# Check if is a prime
def isPrime(n):

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import {Hero} from './hero';
import {HEROES} from './mock-heroes';
import {Injectable} from 'angular2/core';
@Injectable()
export class HeroService {
  getHeroes() {
    return Promise.resolve(HEROES);
  }
  // See the "Take it slow" appendix
  getHeroesSlowly() {

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module Main (main) where

import Control.Monad (forever, when)
import System.Environment (getArgs)
import System.IO (withBinaryFile, hIsEOF, IOMode(ReadMode), hSetBuffering, BufferMode(BlockBuffering))
import Control.Concurrent (threadDelay)
import Blaze.ByteString.Builder.ByteString (fromByteString)
import Data.ByteString (ByteString)
import Data.ByteString as BS
import Data.Text as T

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(function(window, undefined) {
  var SITE_ID = null;
  var NETLIFY_API = "https://api.netlify.com";
  var NetlifyError = function(err) {
    this.err = err;
  };
  NetlifyError.prototype.toString = function() {
    return this.err.message;
  };
  var authWindow, base, providers;

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import cv2
import numpy as np
import matplotlib.pyplot as plt
# show diff
# Approach 0
img = cv2.imread('messi4.jpg')
b,g,r = cv2.split(img)
img2 = cv2.merge([r,g,b])
plt.subplot(121);plt.imshow(img) # expects distorted color
plt.subplot(122);plt.imshow(img2) # expect true color

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import cv2
import numpy as np
from matplotlib import pyplot as plt
# show gray image
plt.imshow(img, cmap=plt.get_cmap('gray'))

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import httplib2 as http
import json

try:
    from urlparse import urlparse
except ImportError:
    from urllib.parse import urlparse

headers = {
    'Accept': 'application/json',

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My Javascript study notes.

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My Python study notes.

ericxyan

My Java study notes.