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function immutableAssign <A, B> (target: A, source: B) {
return Object.assign({}, target, source)
}
function removeElementFromArray <T> (arr: T[], elem: T) {
const index = arr.indexOf(elem)
if (index !== -1) arr.splice(index, 1)
}
function sortBy (obj: any[], key1: string, key2?: string) {
return obj.sort((a, b) => {
const elem1 = key2 ? a[key1][key2] : a[key1]
const elem2 = key2 ? b[key1][key2] : b[key1]
if (elem1 < elem2) return -1
if (elem1 === elem2) return 0
return 1
})
}
function intoArray (value: any) {
if (!value) return undefined
if (Array.isArray(value)) return value
if (typeof value === 'string') return value.split(',')
return [ value ]
}
function toBoolean (value: any) {
if (!value) return undefined
if (typeof value === 'boolean') return value
if (value === 'true') return true
if (value === 'false') return false
return undefined
}
export {
sortBy,
immutableAssign,
removeElementFromArray,
intoArray,
toBoolean
}
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