Interviews | Data structures in JS & interview questions/algorithms | Learning library
kandi X-RAY | Interviews Summary
kandi X-RAY | Interviews Summary
🤓 Data structures in JS & interview questions/algorithms
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of Interviews
Interviews Key Features
Interviews Examples and Code Snippets
Lines of Code : 21
License : No License
Copyfunction performOperation(secondInteger, secondDecimal, secondString) {
// Declare a variable named 'firstInteger' and initialize with integer value 4.
const firstInteger = 4;
// Declare a variable named 'firstDecimal' and initialize wit function reverseStringHalfIndex(str) {
let strArr = str.split('');
let len = strArr.length;
let halfIndex = Math.floor(len / 2) - 1;
let tmp = [];
for (var i = 0; i <= halfIndex; i++) {
tmp = strArr[len - i - 1];
strArr[len - i function inPlaceReverse(arr) {
var i = 0;
while (i < arr.length - 1 ) {
arr.splice(i, 0, arr.pop());
i++;
}
return arr;
} Community Discussions
Trending Discussions on Interviews
QUESTION
Given k sorted arrays what is the most efficient way of getting the intersection of these lists
Example
INPUT:
...ANSWER
Answered 2021-May-13 at 20:54You can use reduce:
QUESTION
All of you know the trivial fizzbuzz question during the first junior interviews. In my case, it was more than write a solution. There were more requirements:
- Only two
if\elsestatements. StringBuilderrequired.- No
Map,Collection. - No ternary operator.
- Only Java core (8 or 11).
- You have only 5 minutes (in my case, but for you it doesn't matter).
My solution with three if statements:
ANSWER
Answered 2021-May-20 at 13:58I'd say your solution with the map was very close, and nobody said "no arrays" :)
QUESTION
My model offers a choice list:
...ANSWER
Answered 2021-May-18 at 07:16To display the user friendly names you have given instead of the values.
QUESTION
In my creation template, the date field is rendered as a CharField and does not allow to select a date, while I need this validation date.
My Model includes a DateField :
...ANSWER
Answered 2021-May-16 at 20:12In you forms.py you can create a class
QUESTION
I had been asked in an interview for PHP. In a PHP file index.php, there are 4 lines of code:
- Line 1 Takes input from user
- Line 2 Encrypts the User input
- Line 3 Decrypts the the Encrypted User input of line 2
- Line 4 Prints the Decrypted content of line 3
On executing this file via command prompt/terminal like php index.php, Original User input of line 1 gets printed/displayed by Line 4 in the command prompt/terminal but when opened/executed in browser the same code did not display anything.
What could be the reason ?
Please explain if anyone knows, would be helpful in future interviews if asked.
...ANSWER
Answered 2021-May-14 at 07:34This could happen if the user input is a valid HTML tag, e.g. something as simple as
QUESTION
Here is the code:
...ANSWER
Answered 2021-Apr-20 at 13:11Why is this the case?
Because you haven't instructed the promise chain to wait for an asynchronous result from the catch handler. You'd need to return a promise from there for that.
Stepping into the then handler doesn't happen "before the catch block is resolved", the catch handler did already execute and did return undefined - that's what the promise chain continues with.
Why doesn't the control move to the bottom of the then block where we would output "Why are we not here..."?
Because right after logging undefined, you access res1.length, which causes the exception TypeError: Cannot read property 'length' of undefined. This rejects the promise, which is not handled anywhere, leading to the warning.
Now onto the real question: how to do this properly? You should avoid the Promise constructor antipattern! The .then() and .catch() calls already return a promise for the result of the handler, which you can and should use - no need to manually resolve or reject a promise, and no unhandled promise rejections because some inner promise is rejected but you fail to propagate this failure outside (notice the "Inside result..." handler should have been called when res1.length errored). Also I recommend to use .then(…, …) instead of .then(…).catch(…) (or .catch(…).then(…)) for conditional success/error handling.
QUESTION
I am working through practice problems for interviews and ran into a problem with an "if" statement that I do not know how to solve. The practice question is as follows:
Two sum. Given an array and a number N, return True if there are numbers A, B in the array such that A + B = N. Otherwise, return False.
Example:
[1, 2, 3, 4], 5 ⇒ True
[3, 4, 6], 6 ⇒ False
My code (below) returns the following error: Error in if (i + A[j] == N) { : missing value where TRUE/FALSE needed
...ANSWER
Answered 2021-Apr-13 at 22:18A vectorized solution without loops:
QUESTION
I have a list of interviews conducted by two survey institutes A + B over a long period of time (several years) and a corresponding date variable:
...ANSWER
Answered 2021-Apr-09 at 13:54From what I understand you want each facet to be an institute, each group per facet to be a weekday, and the filling to be the weekdays themselves. You can shuffle them around to suit your requirement if I have misunderstood.
QUESTION
I am currently preparing for interviews, Java in particular.
A common question is to explain hash maps.
Every explanation says that in case there is more than a single value per key, the values are being linked listed to the bucket.
Now, in HashMap class, when we use put(), and the key is already in the map, the value is not being linked to the existing one (at list as I understand) but replacing it:
...ANSWER
Answered 2021-Apr-06 at 21:45The objects might have the same hashCode, but at the same time not be equal (a collision). In that situation both values will be put as List according to hashCode. Values will be retrieved by hashCode and than you'll get your value among that values by equals operation.
QUESTION
I'm new to mongoose & mongoDB, I have following query, which when run throws the follow error. It would be great if some can help me handle the issue and still get the same output
...ANSWER
Answered 2021-Mar-22 at 15:200
With pipeline inside $lookup, you cannot use localField or foreignField. See the MongoDB documentation for syntax and an example here...
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install Interviews
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page
