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export function copy_move<T>(
array: T[],
oldIndex: number,
newIndex: number,
): T[] {
if (oldIndex < 0 || oldIndex >= array.length) {
throw new Error("Old index out of range.");
}
if (newIndex < 0) {
newIndex = 0;
}
if (newIndex >= array.length) {
newIndex = array.length - 1;
}
const result = array.slice();
const [element] = result.splice(oldIndex, 1);
result.splice(newIndex, 0, element);
return result;
}
export function copy_insert<T>(array: T[], index: number, element: T): T[] {
const result = array.slice();
result.splice(index, 0, element);
return result;
}
export function copy_push<T>(array: T[], element: T): T[] {
const result = array.slice();
result.push(element);
return result;
}
export function copy_delete<T>(array: T[], index: number): T[] {
const result = array.slice();
result.splice(index, 1);
return array;
}
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