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/*jshint -W004 */
const escape = {
'&': '&',
'<': '<',
'>': '>',
'"': '"',
"'": ''',
'`': '`'
};
const badChars = /[&<>"'`]/g,
possible = /[&<>"'`]/;
function escapeChar(chr) {
return escape[chr];
}
export function extend(obj /* , ...source */) {
for (let i = 1; i < arguments.length; i++) {
for (let key in arguments[i]) {
if (Object.prototype.hasOwnProperty.call(arguments[i], key)) {
obj[key] = arguments[i][key];
}
}
}
return obj;
}
export let toString = Object.prototype.toString;
// Sourced from lodash
// https://github.com/bestiejs/lodash/blob/master/LICENSE.txt
/*eslint-disable func-style, no-var */
var isFunction = function(value) {
return typeof value === 'function';
};
// fallback for older versions of Chrome and Safari
/* istanbul ignore next */
if (isFunction(/x/)) {
isFunction = function(value) {
return typeof value === 'function' && toString.call(value) === '[object Function]';
};
}
export var isFunction;
/*eslint-enable func-style, no-var */
/* istanbul ignore next */
export const isArray = Array.isArray || function(value) {
return (value && typeof value === 'object') ? toString.call(value) === '[object Array]' : false;
};
// Older IE versions do not directly support indexOf so we must implement our own, sadly.
export function indexOf(array, value) {
for (let i = 0, len = array.length; i < len; i++) {
if (array[i] === value) {
return i;
}
}
return -1;
}
export function escapeExpression(string) {
if (typeof string !== 'string') {
// don't escape SafeStrings, since they're already safe
if (string && string.toHTML) {
return string.toHTML();
} else if (string == null) {
return '';
} else if (!string) {
return string + '';
}
// Force a string conversion as this will be done by the append regardless and
// the regex test will do this transparently behind the scenes, causing issues if
// an object's to string has escaped characters in it.
string = '' + string;
}
if (!possible.test(string)) { return string; }
return string.replace(badChars, escapeChar);
}
export function isEmpty(value) {
if (!value && value !== 0) {
return true;
} else if (isArray(value) && value.length === 0) {
return true;
} else {
return false;
}
}
export function blockParams(params, ids) {
params.path = ids;
return params;
}
export function appendContextPath(contextPath, id) {
return (contextPath ? contextPath + '.' : '') + id;
}
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