Category "function"

Why does react/javascript recreates a function instance every time we call it?

For example, onChange function: const MyComponent = () => { const onChange = (e) => { doSomething(e.target.value) } return <input onChange={

PostgreSQL- Function to update 3 shared columns from table B on table A

The main goal is to create a function that updates 3 columns on another table (the update of the 2 columns from the first table trigger the update on the second

INDIRECT and CELL to dynamically get value from other worksheet, not working

Trying to dynamically get cell value from worksheet in same workbook, depending on worksheet name in column E =IF(E108<>"",INDIRECT(CELL("contents", E108)

How to reshape my dataset in specific way?

I have a dataset: name val a a1 a a2 b b1 b b2 b b3 c c1 I want to make all possible permutations "names" which are not

C : why is that cast of void function to "pointer to function returning pointer to pointer to void" possible

#include <stdio.h> void hello() { printf("hello world\n"); } int main() { void *(*gibberish)() = (void *(*)())hello; (*gibberish)(); voi

error TS6231: Could not resolve the path '' with the extensions: '.ts', '.tsx', '.d.ts'

I'm working on firebase functions with typescript and this error appears in the console while running tsc . -watch: [12:19:41 PM] Starting compilation in watch

Does Python implement short-circuiting in built-in functions such as min()?

Does Python 3 implement short-circuiting in built-in functions whenever possible, just like it does for boolean statements? A specific example, take the below c

What is function designator and actual call?

According to C99 Standard: The order of evaluation of the function designator, the actual arguments, and subexpressions within the actual arguments is unspe

How can I call parent function in a child React component?

So I want to add delete button, but when I click it I see error: 'TypeError: props.onDeleteTask is not a function' - in component - SingleTask.js //../component

Finding all non-negative integers that add up to a particular value or less, with number of integers changing

I am working in Python. I want to make a function that takes two values: maxSum and n. The output should be all the n-tuples of non-negative integers that add u

R function to start new line every n words?

I want to create an R function that inserts a "\n" after every n words in a string (where n is an argument). e.g. startstring <- "I like to eat fried potat

When are functions assigned to a variable actually computed?

I'm doing some troubleshooting on a Lua function I wrote yesterday as part of a game development effort using the Love2D API. The function is designed to handl

What is double exclamation mark in C#?

From https://source.dot.net/#System.Private.CoreLib/Hashtable.cs,475: public virtual bool ContainsKey(object key!!) It looks like two null-forgiving operators.

Sine fitting using scipy is not returning good fit

trying to fit some sine wave to data i collected. But Amplitude and Frequency are way off. Any suggestions? x=[0,1,3,4,5,6,7,11,12,13,14,15,16,18,20,21,22,24,26

How to convert symmetric matrix to adjacency table

How could I convert symmetric matrix: A B C D A 1 2 3 4 B 2 1 2 3 C 3 2 1 2 D 4 3 2 1 into adjacency matrix?: A A 1 A B 2 A C 3 A D 4 B A 3 B B 1 B C 2 B D

How To write a function to Check for a Sequence of integers in an array in python

I'm trying to figure out why the code I wrote to find a sequence of integers in any given array is not catching all the instances. Could you help, please? Here'

Need replace text with single quotes in SQL

I need to make a script that make a replacement of all the registers of a column that contains: '@xxxx', removing the single quotes. (xxxx could be empty or any

How is math.copysign(x, y) in Python useful?

I was going over the functions of the math module in Python and found the math.copysign (x,y) function. I want to know when someone would use this function. I

How to capitalize the First letter of each word in python?

You are asked to ensure that the first and last names of people begin with a capital letter in their passports. For example, alison heck should be capitalised c

how do I print the inner_inner_func_2 in case without changing the code?

def outer_function(): # this is the outer most function print("I am outer") def inner_func(): # inner function print("I am inner") def