Math.sin() behaving strangely in javascript [closed] - javascript

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For some reason when I input Math.PI and 3.14 I get completely different and even impossible results
Edit: Nevermind, I'm just dumb and didn't notice the e-16

It gives ~10^-16 something very close to zero you can
console.log(Math.sin(Math.PI).toFixed(2))

Here I have set up a test of your problem
console.log(Math.sin(3.14));
console.log(Math.sin(Math.PI));
When run, I get this result:
0.0015926529164868282
1.2246467991473532e-16
The 2nd number is a really really small positive number. It is essentially 0. The first number is slightly larger, but 3.14 is a rounded value of PI, and that's why you get the difference

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Can we still use max-new-space-size in nodejs? [closed]

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Can we still use max-new-space-size in nodejs ? how does it work ?
if yes then what is the ideal ratio between max-old-space-size and max-new-space-size?
can someone please help me understand this ?
No, that flag does not exist.
There is --max-semi-space-size. The best option is to leave it alone. There is no "ideal ratio" between old and new space sizes; their size ratio does not matter.
It's fine to increase the max old space size if you need a bigger heap; there is no reason to change the new space size when you do that.

Point Per Total Price System [closed]

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im trying to build something almost like a cashier system with php jquery and html
so im confuse about the point system
i got a simple input here :The input form
so the user will input their total price and base on that they'll get point ,
so for example user will get 1 poin every $10 , so when the user input $15 he's got 1 poin , and when the user input $13, he's still got 1 point, but when user input $20, he's gonna get 2 point , so thats basically thats how the system work, and my question is how to achieve that kind of system with php
you can use:
$points = floor($price/10);

Is it possible to control the zooming in TeeChart for a javascript? [closed]

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we need to create some buttons to zoom in/zoom out. Also need to set zooming limitation. Is it possible to do these things?
Yes, this is possible using axis SetMinMax method as in the example Yeray posted here. Using SetMinMax you can set the zoom factor and also limit the maximum and minimum zoom levels.

Line spacing 1 1/2 means how much in web development? [closed]

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I have a client requirement to set line space to 1 1/2 (1.5). It's for setting line-height while creating PDF through PHP, and the PDF is a court document (US).
I am not a designer guy, and I am unable to understand the requirement. If some could help me to understand the requirement it will be really helpful for me.
I believe the 1.5 is 1.5x line-height.
Refer to the line-height property in CSS.
This is probably a document requirement ... that there be space between lines, like setting line spacing in MS Word.
The comparable in HTML/css would be CSS setting: line-height.
See https://developer.mozilla.org/en-US/docs/Web/CSS/line-height

Creating more than one array for dataset [closed]

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Consider the example shown in the link Labeling the axis with alphanumeric characters. How to create multiple arrays for the var data ? i.e. two separate for the lines [2,2],[3,3],[4,4],[5, 4],[5.5, 5] and [6, 6],[6, 7],[6.5,8],[6.5,16],[17, 16] ?
If I understand you, I think at this point, you want to start factoring out your code. So, building on this EXAMPLE I have built for you before (inside my comment), here is an UPDATED FIDDLE with both lines. You can factor out the code some more, but this should get you going.
// begin of drawing dots
drawDots(data);
drawDots(data2);
// end of drawing dots

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