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Math - mapping numbers
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https://rosettacode.org/wiki/Map_range
[a1, a2] => [b1, b2]
if s in range of [a1, a2]
then t which will be in range of [b1, b2]
t= b1 + ((s- a1) * (b2-b1))/ (a2-a1)
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How to create a Menubar application for Mac
...nt menubar app a lot simpler. I just created a sample project on github.
https://github.com/taichino/PopupTest
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Format Float to n decimal places
...erFormat factory methods may return subclasses other than DecimalFormat.
https://docs.oracle.com/javase/8/docs/api/java/text/DecimalFormat.html
So what you need to do is (for instance):
NumberFormat formatter = NumberFormat.getInstance(Locale.US);
formatter.setMaximumFractionDigits(2);
formatter...
Best way to add comments in erb
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
Get the position of a div/span tag
...t match to jQuery's $(element).offset()
And it's compatible with IE4+ ...
https://developer.mozilla.org/en-US/docs/Web/API/Element.getBoundingClientRect
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How to change a django QueryDict to Python Dict?
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New in Django >= 1.4.
QueryDict.dict()
https://docs.djangoproject.com/en/stable/ref/request-response/#django.http.QueryDict.dict
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Cannot set boolean values in LocalStorage?
... none of the vendors are interested in supporting storing non-strings. See https://www.w3.org/Bugs/Public/show_bug.cgi?id=12111 for detail.
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Get a random boolean in python?
...for testing, but is capable of providing a variety of fake data.
Install: https://pypi.org/project/Faker/
>>> from faker import Faker
>>> fake = Faker()
>>> fake.pybool()
True
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Removing pip's cache?
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From documentation at https://pip.pypa.io/en/latest/reference/pip_install.html#caching:
Starting with v6.0, pip provides an on-by-default cache which
functions similarly to that of a web browser. While the cache is on by
default and is des...
How to sort an ArrayList?
...sName::getFieldName).reversed()).collect(Collectors.toList());
Sources: https://docs.oracle.com/javase/8/docs/api/java/util/Comparator.html
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