increment-decrement | Simple ways of incrementing/decrementing and sorting rows | Animation library

I'm currently learning ES6 at JavaScript.info, and it says about the increment/decrement operators:

The prefix form returns the new value while the postfix form returns the old value (prior to increment/decrement)...

If we’d like to increase a value and immediately use the result of the operator, we need the prefix form...

If we’d like to increment a value but use its previous value, we need the postfix form.

But I'm confused as to when it would ever be necessary to use the previous value of a variable after it's been incremented? Would it be safe to assume that wherever it is, these are edgecases and the prefix form ++counter should almost always be preferred, or is there actually a good reason that the postfix counter++ form is more commonly seen out in the wild?

I want to print this pattern in python:(10 rows rhombus increment-decrement numbers)

I'm trying to add accessibility to a simple UISlider. I read the Apples adjustable document and saw that I need to implement two functions from the UIAccessibilityAction protocol; accessibilityIncrement() and accessibilityDecrement().

The problem I'm having is that even if I set the slider to be an accessibility element in viewDidLoad and setting slider.accessibilityTraits = .adjustable, the two override functions aren't called even if I change the values.

I also tried to set slider.accessibilityLabel = "test", but it's still not reading the label. Only how far the slider has come. For instance "80%".

Any idea on how I can make this work? I also read these two posts on stackOverflow, but none of them worked for me. accessibilityIncrement / Decrement not called and Accessibility accessibilityDecrement() not getting called

I can also mention that I also tried setting breakpoints at the accessibilityIncrement() and accessibilityDecrement(), but nothing happened.

I have a component which is rendering some values with image id of the s3 bucket. have created one child component which will call to aws server and get image URL. have set loader until API call is in progress. after URL will be received from the call, the loader will stop and an image will be rendered.

Problem: i have some operation on values to be performed. like maintaining values, increment-decrements.

while updating states, a component will be remount. and again image API will be called and loaded.

shouldComponentUpdate won't work. because if I will use it, it will not display changes on the screen.

have set loader till image loads. but it's not a valid thing to show loader on each button click. looking for some better solution. stuck on the issue from past 12 hours. will be really thankful if someone can help me to get rid of this.

Thank You.

My problems is when I was coding the editor of vscode auto replace from relative path to absolute path of all files in my project automatically.

For example: When I import like this:

I am new to ionic and I am stuck on getting iframe to hide when there is no internet connection and reload when internet is back on ionic 1.

I've seen answers on ionic forum and here on stackoverflow like using navigator.online

I followed the guidelines to use nativescript-fresco with ng2+nativescript for my android app because it was crashing every time I scrolled more than once down then up. The component in which I'm using it is a listview which displays 20 online images. The urls are passed from the parent component through a @Input directive which works. However, when I switched to FrescoDrawee, the listview is rendered but the images are not.

Here is the html for the component