67 lines
1.2 KiB
JavaScript
67 lines
1.2 KiB
JavaScript
'use strict';
|
|
|
|
const stripBom = require('strip-bom-string');
|
|
const typeOf = require('kind-of');
|
|
|
|
exports.define = function(obj, key, val) {
|
|
Reflect.defineProperty(obj, key, {
|
|
enumerable: false,
|
|
configurable: true,
|
|
writable: true,
|
|
value: val
|
|
});
|
|
};
|
|
|
|
/**
|
|
* Returns true if `val` is a buffer
|
|
*/
|
|
|
|
exports.isBuffer = function(val) {
|
|
return typeOf(val) === 'buffer';
|
|
};
|
|
|
|
/**
|
|
* Returns true if `val` is an object
|
|
*/
|
|
|
|
exports.isObject = function(val) {
|
|
return typeOf(val) === 'object';
|
|
};
|
|
|
|
/**
|
|
* Cast `input` to a buffer
|
|
*/
|
|
|
|
exports.toBuffer = function(input) {
|
|
return typeof input === 'string' ? Buffer.from(input) : input;
|
|
};
|
|
|
|
/**
|
|
* Cast `val` to a string.
|
|
*/
|
|
|
|
exports.toString = function(input) {
|
|
if (exports.isBuffer(input)) return stripBom(String(input));
|
|
if (typeof input !== 'string') {
|
|
throw new TypeError('expected input to be a string or buffer');
|
|
}
|
|
return stripBom(input);
|
|
};
|
|
|
|
/**
|
|
* Cast `val` to an array.
|
|
*/
|
|
|
|
exports.arrayify = function(val) {
|
|
return val ? (Array.isArray(val) ? val : [val]) : [];
|
|
};
|
|
|
|
/**
|
|
* Returns true if `str` starts with `substr`.
|
|
*/
|
|
|
|
exports.startsWith = function(str, substr, len) {
|
|
if (typeof len !== 'number') len = substr.length;
|
|
return str.slice(0, len) === substr;
|
|
};
|