The Java code below was written to find the last index that x appears in the array A. If x doesn't appear in A, then the function returns -1. int find(int[] A, int x) { int n A.length, i = n -1; while (i = 0) { } } if (A[i] = x) return i; i = 1; == return -1; Homework 3 6 Data Struct. Your task is as follows: 1. Write a precondition and a post-condition for find. Your conditions should be in sync with the invariants and other justification steps you will also make about the code. At the very least, the post-condition should allow us to say that find does find the last index of x as specified above. 2. Specify a loop invariant for the loop that find uses. 3. Fill in the missing Hoare logic justifications so that we have a complete proof that given the precondition, the post-condition holds, thereby find meets the specification.

Prompt: In Python language, write a function that applies the logistic sigmoid function to all elements of a NumPy array. Code: import numpy as np import math import matplotlib.pyplot as plt import pandas as pd def sigmoid(inputArray): modifiedArray = np.zeros(len(inputArray)) #YOUR CODE HERE: return(modifiedArray) def test(): inputs = np.arange(-100, 100, 0.5) outputs = sigmoid(inputs) plt.figure(1) plt.plot(inputs) plt.title('Input') plt.xlabel('Index') plt.ylabel('Value') plt.show() plt.figure(2) plt.plot(outputs,'Black') plt.title('Output') plt.xlabel('Index') plt.ylabel('Value') plt.show() test()

Write the function lastOf which searches the array a for the last occurance of any value contained in the array b. Returns the index if found. If not found, return -1. arrays.cpp 1 #include 2 3 int lastof(const int a[), int alen, const int b[], int blen) 4 { int res = 0; for (int i = 0; i =0 ; j--) if (b[j] == a[i]) { if(res[1, 9, 4, 5, 1, 5, 1, 12, 8, 11, 2, 11, 7, 8] b1->[7, 5, 9] last0f(al, 14, b1, 3): -1 Expected: 12 al->[1, 9, 4, 5, 1, 5, 1, 12, 8, 11, 2, 11, 7, 8] b2->[7, 7] lastof (al, 14, b2, 2): -1 Expected: 12 a2->[3, 2, 1, 14, 10, 6, 13, 1ө, 11, 13, 14] b2->[7, 7] lastof (a2, 11, b2, 2): -1 Expected: -1 а2->[3, 2, 1, 14, 10, 6, 13, 1ө, 11, 13, 14] b1->[7, 5, 9] last0f (a2, 11, b1, 3): -1 Expected: -1 а2->[3, 2, 1, 14, 10, 6, 13, 10, 11, 13, 14] b3->[11, 2, 1, 15] lastof (a2, 11, b3, 4): -1 Expected: 8 Score 2/5

What does each line of code mean?

6.Code for- an array of meeting time intervals consisting ofstart and end times [[s1,e1],[s2,e2],...] (si < ei),determine if a person could attend all meetings. For example,Given [[0, 30],[5, 10],[15, 20]],return false.""".

4. Arrays. In order to test the functions in this question, you will need an array. We can create a three- dimensional test array as follows: testArray xijk - máx rij,k i=1 i=1 i=1 (b) Now suppose we want a function testFn2 which returns the d2 x d3 matrix {zj.k} where di Zj,k = Σ i=1

Write a findSpelling Function -PHP Write a function findSpellings($word, $allWords) that takes a string and an array of dictionary words as parameters. The function should return an array of possible spellings for a misspelled $word. One way to approach this is to use the soundex() Words that have the same soundex are spelled similarly. Return an array of words from $allWords that match the soundex for $word. I have most of the code. How do I append the $sound to the $mathcing array?