seven-phases-max

#include <cmath>
#include <iostream>
#include <iomanip>

const double C0       = 16.352;
const double ln2per12 = std::log(2.) / 12;

// your ref and approx frequency values:
const int      index[] = {46, 623, 954};
const double refFreq[] = {1.33304775683583476286742097727255895733833313, 37.3506591867008808094396954402327537537, 252.719842525523120002617361024022102356};

seven-phases-max

momomo:

I've asked about this for years, on Stackoverflow twice, and the question keeps being disregarded and closed down, primarily by @seven-phases-max

Lie. Here's the topic. As you can see there's no even a single downvote. His another question was closed because it was exactly identical to his first one - which is directly against SO rules (closed not even by me - @momomo, before you start lying about someone closing your Q at SO learn how these things work there first).

who refuses to understand why this is even an important thing

Ah, right. "What do I pay him for?"

seven-phases-max

// establish themes:

#theme(default) {
    @primary:  black;
    @contrast: white;
}

#theme(inverted) {
    @primary:  white;

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@han_cart_icon: fa-shopping-cart;
@han_fa_name:  "Font Awesome\ 5 Free";

.change_basket_icon() when (@han_cart_icon = fa-shopping-cart) {
    i.ty-icon-moon-commerce,
    .ty-icon-basket {
        font-family: @han_fa_name;
        &:before {
            content: "\f07a";
        }

seven-phases-max

@han_cart_icon:  fa-shopping-cart;
@han_fa_version: v5;

.change_basket_icon() when (@han_cart_icon = fa-shopping-cart) {
    i.ty-icon-moon-commerce,
    .ty-icon-basket {
        & when (@han_fa_version = v4) {
            font-family: FontAwesome;
        }

seven-phases-max

49959577 Demo.

seven-phases-max

@font-size-min: 16px;
@font-size-max: 18px;
@font-size-diff: (@font-size-max - @font-size-min);

body {
    .eval(@font-size-diff);
    font-size: calc((100vw - @font-size-min) / @eval-result);
}

.eval(@expr) {

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.y {
    y: y  
}

seven-phases-max

Demo

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// Usage:

a {
   .text-transform(upper);
}

b {
   .text-transform(none);
}