66 lines
2.0 KiB
JavaScript
66 lines
2.0 KiB
JavaScript
|
/**
|
||
|
|
* @license
|
||
|
|
* Copyright (c) 2016, Contributors
|
||
|
|
* SPDX-License-Identifier: ISC
|
||
|
|
*/
|
||
|
|
export function camelCase(str) {
|
||
|
|
// Handle the case where an argument is provided as camel case, e.g., fooBar.
|
||
|
|
// by ensuring that the string isn't already mixed case:
|
||
|
|
const isCamelCase = str !== str.toLowerCase() && str !== str.toUpperCase();
|
||
|
|
if (!isCamelCase) {
|
||
|
|
str = str.toLowerCase();
|
||
|
|
}
|
||
|
|
if (str.indexOf('-') === -1 && str.indexOf('_') === -1) {
|
||
|
|
return str;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
let camelcase = '';
|
||
|
|
let nextChrUpper = false;
|
||
|
|
const leadingHyphens = str.match(/^-+/);
|
||
|
|
for (let i = leadingHyphens ? leadingHyphens[0].length : 0; i < str.length; i++) {
|
||
|
|
let chr = str.charAt(i);
|
||
|
|
if (nextChrUpper) {
|
||
|
|
nextChrUpper = false;
|
||
|
|
chr = chr.toUpperCase();
|
||
|
|
}
|
||
|
|
if (i !== 0 && (chr === '-' || chr === '_')) {
|
||
|
|
nextChrUpper = true;
|
||
|
|
}
|
||
|
|
else if (chr !== '-' && chr !== '_') {
|
||
|
|
camelcase += chr;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return camelcase;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
export function decamelize(str, joinString) {
|
||
|
|
const lowercase = str.toLowerCase();
|
||
|
|
joinString = joinString || '-';
|
||
|
|
let notCamelcase = '';
|
||
|
|
for (let i = 0; i < str.length; i++) {
|
||
|
|
const chrLower = lowercase.charAt(i);
|
||
|
|
const chrString = str.charAt(i);
|
||
|
|
if (chrLower !== chrString && i > 0) {
|
||
|
|
notCamelcase += `${joinString}${lowercase.charAt(i)}`;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
notCamelcase += chrString;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return notCamelcase;
|
||
|
|
}
|
||
|
|
export function looksLikeNumber(x) {
|
||
|
|
if (x === null || x === undefined)
|
||
|
|
return false;
|
||
|
|
// if loaded from config, may already be a number.
|
||
|
|
if (typeof x === 'number')
|
||
|
|
return true;
|
||
|
|
// hexadecimal.
|
||
|
|
if (/^0x[0-9a-f]+$/i.test(x))
|
||
|
|
return true;
|
||
|
|
// don't treat 0123 as a number; as it drops the leading '0'.
|
||
|
|
if (/^0[^.]/.test(x))
|
||
|
|
return false;
|
||
|
|
return /^[-]?(?:\d+(?:\.\d*)?|\.\d+)(e[-+]?\d+)?$/.test(x);
|
||
|
|
}
|