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// cheap lodash replacements
/**
* drop-in replacement for _.get
* @param obj
* @param path
* @param defaultValue
*/
export function get(obj, path, defaultValue) {
return path
.split('.')
.reduce((a, c) => (a && a[c] ? a[c] : defaultValue || null), obj);
}
/**
* drop-in replacement for _.without
*/
export function without(items, item) {
return items.filter((i) => i !== item);
}
/**
* drop-in replacement for _.isString
* @param input
*/
export function isString(input) {
return typeof input === 'string';
}
/**
* drop-in replacement for _.isString
* @param input
*/
export function isObject(input) {
return typeof input === 'object';
}
/**
* repalcement for _.xor
* @param itemsA
* @param itemsB
*/
export function xor(itemsA, itemsB) {
const map = new Map();
const insertItem = (item) => {
map.set(item, map.has(item) ? map.get(item) + 1 : 1);
};
itemsA.forEach(insertItem);
itemsB.forEach(insertItem);
const result = [];
map.forEach((count, key) => {
if (count === 1) {
result.push(key);
}
});
return result;
}
/**
* replacement for _.intersection
* @param itemsA
* @param itemsB
*/
export function intersection(itemsA, itemsB) {
return itemsA.filter((t) => itemsB.indexOf(t) > -1);
}