kandi X-RAY | interview-practice Summary
kandi X-RAY | interview-practice Summary
Kevin's coded solutions to interview problems
Top functions reviewed by kandi - BETA
- Prints a random list
- Initializes a linked list with randomness
- Removes kth element from the head
- Recursively prints out each node
- Prints random list
- Inserts a new node in the list
- Initializes a new list with random elements
- Prints a list
- Demonstrates how to analyze the graph
- Recursive function to depth first search
- Performs depth - first search on the given source
- Prints the array
- Prints an array
- Partition the subarray
- Test program
- Matrix multiplication
- Initializes the elements of a matrix
- Demonstrates how to run a program
- Prints a linked list
- Detects a cycle in the linked list
- Prints binary search tree
- Adds a new node to the tree
- Creates a BFS - first search
- Run a BFS on the given source
- Prints the linked list
- Initializes the list with a random number of elements
interview-practice Key Features
interview-practice Examples and Code Snippets
Trending Discussions on interview-practice
I have a task (or more like a challenge) found on Code-Signal (a site where do you can do some programming-related tasks. This special task was asked by google in an interview:
If you want to try it for yourself: Code-Fight.
After solving an issue, you are allowed to see other solutions.
My task was "find the first dupe in an array". I managed to do this (i'll show the way), but I'm not happy with my result. After investigating the top-solutions, I was confused, since I don't understand whats going on there.
This was (a) given example input array...
ANSWERAnswered 2019-Mar-07 at 13:17
By specifying your variable with an additional $ (variables variable) PHP creates a "hidden/fake array". While running each index gets filled with a "0":
After the first run you got something like
I would like to extract a very specific portion of a 2D array in Python using the
zip() method (and avoid messy for loop logic). I'd like to use zip to achieve something like this:
ANSWERAnswered 2017-Jun-25 at 17:18
No zip but
[row[:3] for row in grid[:3]]
c) but not for the case where there are no repeating elements.
ANSWERAnswered 2018-Jun-06 at 05:41
You want to reset
counts each time
firstDuplicate is called. Otherwise each call will share the same object.
You are also referencing
a in the
for loop but should be referencing the
arr function parameter.
I need to optimize my answer for the following question without exceeding time limit (0.5s). This isn't a homework or a competition or my interview question. I'm currently learning programming by my self for fun and I found this online.
Given an array a that contains only numbers in the range from 1 to a.length, find the first duplicate number for which the second occurrence has the minimal index. In other words, if there are more than 1 duplicated numbers, return the number for which the second occurrence has a smaller index than the second occurrence of the other number does. If there are no such elements, return -1.
This is my answer:...
ANSWERAnswered 2018-Feb-27 at 13:21
First (naive) optimization: start the inner loop at
Second (also naive, since it uses quite a lot of memory) optimization: Allocate an array of length
a.length, initialize to
-1. Then, iterate once through your data and as soon as a number is found, store its index. If an index has been found already, you can detect that by checking against
-1, and you have your duplicate.
This feels like it should be simple, but I'm just not getting it for some reason. I decided to take on an apparently common programming interview question to test my skillset:
"Given an array a that contains only numbers in the range from 1 to a.length, find the first duplicate number for which the second occurrence has the minimal index. In other words, if there are more than 1 duplicated numbers, return the number for which the second occurrence has a smaller index than the second occurrence of the other number does."
I believe I have the correct code, but I can't get the loop to stop running. Given the example array, the function should return "3", since that is the first number that repeats (not the first number seen). However, no matter what I try, it either returns 2 or an error.MY CODE ...
ANSWERAnswered 2017-Dec-30 at 14:05
You are returnig value in foreach function. This function is called for evry element in array and it's return value is ignored.
for loop and return from it.
No vulnerabilities reported
You can use interview-practice like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the interview-practice component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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