mirror of
https://github.com/pezkuwichain/pezkuwi-common.git
synced 2026-04-22 07:57:59 +00:00
60 lines
2.2 KiB
JavaScript
60 lines
2.2 KiB
JavaScript
export const CC_TO_UP = new Array(256);
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export const CC_TO_LO = new Array(256);
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for (let i = 0, count = CC_TO_UP.length; i < count; i++) {
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CC_TO_LO[i] = String.fromCharCode(i).toLowerCase();
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CC_TO_UP[i] = String.fromCharCode(i).toUpperCase();
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}
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/** @internal */
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function formatAllCaps(w) {
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return w.slice(0, w.length - 1).toLowerCase() + CC_TO_UP[w.charCodeAt(w.length - 1)];
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}
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/**
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* @internal
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*
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* Inspired by https://stackoverflow.com/a/2970667
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*
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* This is not as optimal as the original SO answer (we split into per-word),
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* however it does pass the tests (which the SO version doesn't) and is still
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* a major improvement over the original camelcase npm package -
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*
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* camelcase: 20.88 μs/op
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* this: 1.00 μs/op
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*
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* Caveat of this: only Ascii, but acceptable for the intended usecase
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*/
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function converter(format) {
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return (value) => {
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const parts = value
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// replace all separators (including consequtive) with spaces
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.replace(/[-_., ]+/g, ' ')
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// we don't want leading or trailing spaces
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.trim()
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// split into words
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.split(' ');
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let result = '';
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for (let i = 0, count = parts.length; i < count; i++) {
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const w = parts[i];
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// apply the formatting
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result += format(/^[\dA-Z]+$/.test(w)
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// all full uppercase + letters are changed to lowercase
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? w.toLowerCase()
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// all consecutive capitals + letters are changed to lowercase
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// e.g. UUID64 -> uuid64, while preserving splits, eg. NFTOrder -> nftOrder
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: w.replace(/^[\dA-Z]{2,}[^a-z]/, formatAllCaps), i);
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}
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return result;
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};
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}
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/**
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* @name stringCamelCase
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* @summary Convert a dash/dot/underscore/space separated Ascii string/String to camelCase
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*/
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export const stringCamelCase = /*#__PURE__*/ converter((w, i) =>
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(i ? CC_TO_UP[w.charCodeAt(0)] : CC_TO_LO[w.charCodeAt(0)]) + w.slice(1));
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/**
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* @name stringPascalCase
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* @summary Convert a dash/dot/underscore/space separated Ascii string/String to PascalCase
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*/
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export const stringPascalCase = /*#__PURE__*/ converter((w) =>
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CC_TO_UP[w.charCodeAt(0)] + w.slice(1));
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