generate-alphabetic-name
Version:
Take an arbitrary string or integer and generate a short alphabetic code. It works in the browser and node.js and is designed to be as small as possible, and extremely fast.
26 lines • 1.1 kB
JavaScript
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// source: https://github.com/styled-components/styled-components/blob/0aa3170c255a49cd41c3fbeb2b8051b5d132f229/src/utils/generateAlphabeticName.js
Object.defineProperty(exports, "__esModule", { value: true });
// This is the "capacity" of our alphabet i.e. 2x26 for
// all letters plus their capitalised counterparts
const charsLength = 52;
// start at 97 for 'a' until 'z' and then start
// at 65 for capitalised letters
const getAlphabeticChar = (code) => String.fromCharCode(code + (code > 25 ? 39 : 97));
/**
* Generate a short alphabetic code (base-52) for an integer
*
* @param code An integer
* @returns A short string using only /[a-zA-Z]+/
*/
function generateAlphabeticNameFromNumber(code) {
let name = '';
let x;
// get a char and divide by alphabet-length
for (x = code; x >= charsLength; x = Math.floor(x / charsLength)) {
name = getAlphabeticChar(x % charsLength) + name;
}
return getAlphabeticChar(x % charsLength) + name;
}
exports.default = generateAlphabeticNameFromNumber;
//# sourceMappingURL=generateAlphabeticNameFromNumber.js.map