David Hruska

MathWorks

157 total contributions since 2011

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Answered
Unit Test: Write parametrized tests where TestParameters depends on ClassSetupParameters?
Sorry for the long delay in replying! Were you able to find a workaround? The only workaround I can think of is to manually c...

1 year ago | 0

Answered
How can I pass values from inside a TestRunner run?
You can use a TestRunnerPlugin to store data from the test run. I've included some example code below to show how this might wor...

1 year ago | 0

| accepted

Solved

Number of Even Elements in Fibonacci Sequence
Find how many even fibonacci numbers are available in the first d numbers. Consider the following first 14 numbers 1 1 2...

2 years ago

Solved

The 5th Root
Write a function to find the 5th root of a number. It sounds easy, but the typical functions are not allowed (see the test su...

2 years ago

Answered
How can I make a mock method return different answers?
Unfortunately, there isn't a clean way to do this. I'll record this question in an enhancement request, though, for consideratio...

2 years ago | 1

| accepted

Solved

Combine the first and last names
MATLAB R2016 provides a rich set of functions to work with string arrays. In this problem, you will be given two string arrays o...

3 years ago

Answered
How to use constant property when defining TestParameter in unittest.
This is a bug: https://www.mathworks.com/support/bugreports/1212962 The bug report mentions Static methods but the same is...

3 years ago | 1

| accepted

Solved

This is a palindrome and so am I
A palindrome is a sequence of characters which reads the same backward or forward, for instance 'a man a plan a canal panama'...

4 years ago

Answered
Parameters for Matlab.unittest.TestCase
If you have access to R2014a or later, parameterized testing could still be an option. Parameter values are often hard-coded but...

5 years ago | 2

Answered
How to perform multiple identical unit tests.
Release 2014a provides another solution that you may want to consider -- writing a parameterized test. Please see <http://www.ma...

6 years ago | 1

Answered
Data driven Unit Tests
Another possibility, as of release 2014a, is to write a <http://www.mathworks.com/help/matlab/matlab_prog/create-basic-parameter...

6 years ago | 2

Solved

Simple equation: Annual salary
Given an hourly wage, compute an annual salary by multiplying the wage times 40 and times 50, because salary = wage x 40 hours/w...

6 years ago

Solved

Equilibrium
Is this tower of blocks going to fall? <<http://www.alfnie.com/software/equilibrium02.jpg>> *Description* Given a stack...

6 years ago

Answered
How to perform multiple identical unit tests.
Hi Graham, One approach is to define your test content in an abstract base class. The test content would refer to an abstract...

6 years ago | 2

| accepted

Solved

Coin change combinations.
Using only pennies (1), nickels (5), dimes (10), quarters (25), half dollars (50), and dollars (100), how many different combina...

7 years ago

Solved

Unique values without using UNIQUE function
You must return unique values in a vector in *stable* mode without using the unique function. About stable order flag: ...

7 years ago

Solved

Create logical matrix with a specific row and column sums
Given two numbers *|n|* and *|s|*, build an |n-by-n| logical matrix (of only zeros and ones), such that both the row sums and th...

7 years ago

Solved

Replicate elements in vectors
Replicate each element of a row vector (with NaN) a constant number of times. Examples : n=2, A=[1 2 3] -> [1 1 2 2 3 3] n=0...

7 years ago

Solved

Community Problem 500!
In honor of this being the 500th Community problem, see if you can create a function that has a Cody size of 500. It can do any...

7 years ago

Solved

Find the sum of the elements in the "second" diagonal
Find the sum of the elements in the diagonal that starts at the top-right corner and ends at the bottom-left corner.

7 years ago

Solved

Set the array elements whose value is 13 to 0
Input A either an array or a vector (which can be empty) Output B will be the same size as A . All elements of A equal to 13...

7 years ago

Solved

Convert single-precision floating-point number to binary representation
Write a function which takes a scalar <http://en.wikipedia.org/wiki/Single-precision_floating-point_format single-precision floa...

7 years ago

Solved

Multiply 2 numbers
Very easy, you just have to multiply 2 numbers but you cannot use the following signs (*, /, - ,^) ,mtimes , times, cross, pro...

7 years ago

Solved

Create a matrix from a cell
In this problem , you must convert a cell into a matrix and pad each cell with NaN. *Example 1:* If you have the input...

7 years ago

Solved

Assign numerical values to a structure with 1 field
The aim is to assign values to a multidimensional structure *without using for-loop or while-loop* Example with a structure ...

7 years ago

Solved

Accumulate Cells
Given a combining function, a cell array, and an initial value, accumulate the result. For example, accumcell(@plus,{1,...

7 years ago

Solved

Find the biggest empty box
You are given a matrix that contains only ones and zeros. Think of the ones as columns in an otherwise empty floor plan. You wan...

7 years ago

Solved

Ackermann's Function
Ackermann's Function is a recursive function that is not 'primitive recursive.' <http://en.wikipedia.org/wiki/Ackermann_fun...

7 years ago

Solved

Reindex a vector
You are given two vectors of equal length. Vector N has numeric values (no Inf or NaN) while vector IDX has integers. Place th...

7 years ago

Solved

Return the first and last character of a string
Return the first and last character of a string, concatenated together. If there is only one character in the string, the functi...

7 years ago

David Hruska

MathWorks

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