Categories
Mastering Development

How can I tell Google Benchmark to not benchmark a line of code?

I am using Google Benchmark to benchmark a library. I have the benchmark set up as follows: for (auto _ : state) { run_function(first, last, v); } What I would like is for v to be randomly generated every iteration so that I could get a range of benchmark values and obtain the statistics from […]

Categories
Mastering Development

How can I fix my QuickSort list index error without a try/except?

so I have the following code and I’m not sure how to modify this without using a try/except. Any help? The error occurs when it sorts [64, 12, 11] with 12 as the pivot because the list is of length 3 and i is at 2. def quickSort(arr): ”’Quick Sort Algorithm”’ ”’Worst Case: O(n^2). Occurs […]

Categories
Mastering Development

SQL Server 2014: Pairing rows from 2 tables based on values coming from a third one

I have 2 tables that contains typed events over time. The first table #T1 contains events that always comes before events in the second table #T2. A third table #E contains records that defines for an event the values that comes in #T1 and #T2 respectively. Sample data: CREATE TABLE #T1 ( EventTimestamp DateTime, VehicleId […]

Categories
Mastering Development

str_detect on multiple columns in the same row

I have two datasets, one with full names and one with first and last names. library(tidyverse) (x = tibble(fullname = c("Michael Smith", "Elisabeth Brown", "John-Henry Albert"))) #> # A tibble: 3 x 1 #> fullname #> <chr> #> 1 Michael Smith #> 2 Elisabeth Brown #> 3 John-Henry Albert (y = tribble(~first, ~last, "Elisabeth", "Smith", […]

Categories
Mastering Development

I am having a very strange issue using styled-components. I have a style rule which should be applied to <tr> elements on focus: const TableStyles = styled.table` width: 100%; table-layout: auto; border-collapse: collapse; tr:focus { background-color: #e7f0ff; } `; This rule works for the table rows in the table body but does not work for […]

Categories
Mastering Development

how to make a qsort function and sort array of pointers to structs

i’m trying to make a qsort function from scratch that sorts an array of pointers to structs this is the code i have right now static void swap(int *a, int *b) { int tmp = *a; *a = *b; *b = tmp; } void _qsort(void* list, int list_len, int left, int right, int(*comp)(const struct shpg_item […]

Categories
Mastering Development

Singly linked List Find max,min

**This is a singly linked list and the professor wants me 2 find max min from define limit of singly list list ( similar 2 find array but use singly linked list instead ) however when i want 2 remove the number in singly linked list even if i’m not finish with it it get […]

Categories
Mastering Development

How can Function have instance methods?

MDN says that Function object has instance and prototype properties (e.g. name is an instance property of Function). So I can do this: function testA() { console.log(“testA”); } console.log(testA.name); console.log(Function.name); But how? Function is an object constructor function. The only way to pass proprties to its instances is through .this keyword that saves them to […]

Categories
Mastering Development

recursive binarySearch with array of strings

My function works for the first 4 elements, but returns -1 for 12 and 14..even though there in the array. I’ve tried changing some of the if statements and using .compare but haven’t had any luck. Any ideas? Thanks /** Searches the array anArray[first] through anArray[last] for a given value by using a binary search. […]

Categories
Mastering Development

Unexpected surprise (?) from the updater methods of JDBC ResultSet

We have some data in a MySQL database that we are accessing via JDBC. Depending upon the value read from the database, we wanted to play some “tricks” in the code. I read the documentation on the updater methods of ResultSet and I was heartened to find the following text repeated for all the updateXXX […]