main repo

node_modules/motion-utils/dist/es/array.mjs

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+function addUniqueItem(arr, item) {
+    if (arr.indexOf(item) === -1)
+        arr.push(item);
+}
+function removeItem(arr, item) {
+    const index = arr.indexOf(item);
+    if (index > -1)
+        arr.splice(index, 1);
+}
+// Adapted from array-move
+function moveItem([...arr], fromIndex, toIndex) {
+    const startIndex = fromIndex < 0 ? arr.length + fromIndex : fromIndex;
+    if (startIndex >= 0 && startIndex < arr.length) {
+        const endIndex = toIndex < 0 ? arr.length + toIndex : toIndex;
+        const [item] = arr.splice(fromIndex, 1);
+        arr.splice(endIndex, 0, item);
+    }
+    return arr;
+}
+
+export { addUniqueItem, moveItem, removeItem };