This function finds the middle value of an array. But the conditional statement makes no sense to me, since arr.length === 0 is never true but the function still works for both even and odd numbers. I think the condition should be arr.length % 2 !== 0 and it works too, but even then I don’t see how the correct
Tag: conditional-statements
What is the best option, a loop inside a conditional or a conditional inside a loop?
Seems obvious, but let’s say we have 2 arrays and I want to push some objects inside if certain condition is true. Generally speaking, it would be better like this: or like this: I think the second option looks shorter, but maybe it’s worse in performance. Answer The best is:
Conditional Form Inputs – Multiple Fields Shown/Hidden
I am attempting to build a form that hides multiple input boxes of the form unless a condition is met. So the question would be: Do you have a separate mailing address? Yes No If “yes” is selected, I want to then show three input fields for their mailing address, city, and zip. If “no,” then I don’t want anything
How to split nested ternary operator into normal if else condition
I was trying to understand ternary operator into normal if else condition. stateable = data.length > 0 ? data[0].list > data[0].somelist ? Product.ADDING : Product.REMOVING : Product.NOTHING …
Rendering Content Conditionally in React JS Based on the state
I have a page that renders questions that have been posted. I want to create a button that displays only answered questions based on the state = {isAnswered: true}. Is the state isAnswered is true …
In what situation would ‘a != a’ resolve to true in JavaScript?
Looking through the code of svelte.js I found this odd looking function: function not_equal(a, b) { return a != a ? b == b : a !== b; } Can someone explain to me in what situation comparing a …
Google sheets automatic Notes [with onEdit() function] on cells’ values resulting from formulas
Is it possible to create automatic Notes based on cells variable values resulting from formulas ? For example A1=stxt(B1;1;4) gives “some” with B1=sometext (variable value), so that A1’s …
Why is the condition in this callback always returns false?
I have a home SPA based on Vue. One of the components is driven by a v-if=”isDisplayed”. This isDisplayed is set by listening to a MQTT topic (see footnote) and new messages received are …
Better way to write spread operator with conditions in javascript
I’m looking for a better way to write the following code: let fromCreatedAt; let toCreatedAt = new Date(); const someObject = { …((!!fromCreatedAt || !!toCreatedAt) ? { createdAt: { …
How Can I Simplify This JSX Conditional Code?
I´ve got this code snippet: export const MessageWindow: FunctionComponent
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