AlexJuca

,;lskdla;dlka;lsd,adasd

AlexJuca

public static void findStudent(int key, int[] studentList) {
		  int N = studentList.length;
		  for(int i = 0; i < N; i++) {
		    if(studentList[i] == key) {
		    System.out.println("Key has been found");
		  } else System.out.println(" Key was not found ");

		}
	}

AlexJuca

public static void findStudent(int key, int[] studentList) {
		 final long startTime = System.nanoTime();
		  int N = studentList.length;
		  for(int i = 0; i < N; i++) {
		    if(studentList[i] == key) {
		    System.out.println("Key has been found");
		  } else System.out.println(" Key was not found ");
		    
		}
		  final long endTime = System.nanoTime();

AlexJuca

public static int binarySearch(int key, int[] largeList) {
  int lo = 0;
  int hi = largeList.length - 1;
  while(lo <= hi) {
      int mid = (lo + hi) / 2;
      if(key < largeList[mid]) hi = mid - 1;
      else if (key > largeList[mid]) lo = mid + 1;
      else return mid;
  }
  return -1;

AlexJuca

android {
    defaultConfig { 
        vectorDrawables.useSupportLibrary = true  
    }
}

AlexJuca

Ruby on Rails Cheatsheet

Architecture

Create a new application

Install the Rails gem if you haven't done so before

AlexJuca

import numpy as np
import pandas as pd
# Create a dictionary that we used to create our pandas DataFrame
fake_dataset = {'Price':[1000,2109, np.nan], 'Size':[55,np.nan, 75], 'N of Rooms':[3, 2, 5]}
pd = pd.DataFrame(fake_dataset)

pd.dropna()

pd.dropna(axis=1)

AlexJuca

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

AlexJuca

class UserProfileViewModel: ViewModel {
	var userProfileData: MutableLiveData<User>? = null
	
}

AlexJuca

 override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_user_profile)
        mViewModel = ViewModelProviders.of(this).get(UserProfileViewModel.class);
   // Other setup code below...
}