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Utility.js
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Utility.js
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/**
* @param {number}
* @return {number}
*/
export var abs = Math.abs
/**
* @param {number}
* @return {string}
*/
export var from = String.fromCharCode
/**
* @param {object}
* @return {object}
*/
export var assign = Object.assign
/**
* @param {string} value
* @param {number} length
* @return {number}
*/
export function hash (value, length) {
return charat(value, 0) ^ 45 ? (((((((length << 2) ^ charat(value, 0)) << 2) ^ charat(value, 1)) << 2) ^ charat(value, 2)) << 2) ^ charat(value, 3) : 0
}
/**
* @param {string} value
* @return {string}
*/
export function trim (value) {
return value.trim()
}
/**
* @param {string} value
* @param {RegExp} pattern
* @return {string?}
*/
export function match (value, pattern) {
return (value = pattern.exec(value)) ? value[0] : value
}
/**
* @param {string} value
* @param {(string|RegExp)} pattern
* @param {string} replacement
* @return {string}
*/
export function replace (value, pattern, replacement) {
return value.replace(pattern, replacement)
}
/**
* @param {string} value
* @param {string} search
* @param {number} position
* @return {number}
*/
export function indexof (value, search, position) {
return value.indexOf(search, position)
}
/**
* @param {string} value
* @param {number} index
* @return {number}
*/
export function charat (value, index) {
return value.charCodeAt(index) | 0
}
/**
* @param {string} value
* @param {number} begin
* @param {number} end
* @return {string}
*/
export function substr (value, begin, end) {
return value.slice(begin, end)
}
/**
* @param {string} value
* @return {number}
*/
export function strlen (value) {
return value.length
}
/**
* @param {any[]} value
* @return {number}
*/
export function sizeof (value) {
return value.length
}
/**
* @param {any} value
* @param {any[]} array
* @return {any}
*/
export function append (value, array) {
return array.push(value), value
}
/**
* @param {string[]} array
* @param {function} callback
* @return {string}
*/
export function combine (array, callback) {
return array.map(callback).join('')
}
/**
* @param {string[]} array
* @param {RegExp} pattern
* @return {string[]}
*/
export function filter (array, pattern) {
return array.filter(function (value) { return !match(value, pattern) })
}