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const drop = (arr, n = 1) => arr.slice(n); const dropRight = (arr, n = 1) => arr.slice(0, -n); const dropRightWhile = (arr, func) => { - while (arr.length > 0 && !func(arr[arr.length - 1])) arr = arr.slice(0, -1); - return arr; + let rightIndex = arr.length; + while (rightIndex-- && !func(arr[rightIndex])); + return arr.slice(0, rightIndex + 1); }; const dropWhile = (arr, func) => { while (arr.length > 0 && !func(arr[0])) arr = arr.slice(1); diff --git a/dist/_30s.js b/dist/_30s.js index 476d2a3af..394fa39a5 100644 --- a/dist/_30s.js +++ b/dist/_30s.js @@ -282,8 +282,9 @@ const drop = (arr, n = 1) => arr.slice(n); const dropRight = (arr, n = 1) => arr.slice(0, -n); const dropRightWhile = (arr, func) => { - while (arr.length > 0 && !func(arr[arr.length - 1])) arr = arr.slice(0, -1); - return arr; + let rightIndex = arr.length; + while (rightIndex-- && !func(arr[rightIndex])); + return arr.slice(0, rightIndex + 1); }; const dropWhile = (arr, func) => { while (arr.length > 0 && !func(arr[0])) arr = arr.slice(1); diff --git a/snippet_data/snippetList.json b/snippet_data/snippetList.json index 35fde23f6..d2b1c6f58 100644 --- a/snippet_data/snippetList.json +++ b/snippet_data/snippetList.json @@ -386,7 +386,7 @@ "archived": false }, "meta": { - "hash": "ab66ab76096083ad5861e228065926db7b8aee7f240d12ad00467a78b35f089c" + "hash": "92073a46ed91184fb52d53ecc1ef1265c8eaf3e13f9715796a4c19ebed2e9556" } }, { @@ -1043,7 +1043,7 @@ "archived": false }, "meta": { - "hash": "2ae245946d7c0d704aa1bbadf43afad388c09ac5dba409439b8ea79c1d4ad944" + "hash": "3ce42322e5de148e0000781954289a75f19453def5a75de07e56a0d1cd0987ae" } }, { diff --git a/snippet_data/snippets.json b/snippet_data/snippets.json index 51df974f7..e536c8273 100644 --- a/snippet_data/snippets.json +++ b/snippet_data/snippets.json @@ -568,7 +568,7 @@ }, "meta": { "archived": false, - "hash": "ab66ab76096083ad5861e228065926db7b8aee7f240d12ad00467a78b35f089c" + "hash": "92073a46ed91184fb52d53ecc1ef1265c8eaf3e13f9715796a4c19ebed2e9556" } }, { @@ -1528,8 +1528,8 @@ "fileName": "dropRightWhile.md", "text": "Removes elements from the end of an array until the passed function returns `true`. Returns the remaining elements in the array.\n\nLoop through the array, using `Array.prototype.slice()` to drop the last element of the array until the returned value from the function is `true`.\nReturns the remaining elements.", "codeBlocks": { - "es6": "const dropRightWhile = (arr, func) => {\n while (arr.length > 0 && !func(arr[arr.length - 1])) arr = arr.slice(0, -1);\n return arr;\n};", - "es5": "var dropRightWhile = function dropRightWhile(arr, func) {\n while (arr.length > 0 && !func(arr[arr.length - 1])) {\n arr = arr.slice(0, -1);\n }\n\n return arr;\n};", + "es6": "const dropRightWhile = (arr, func) => {\n let rightIndex = arr.length;\n while (rightIndex-- && !func(arr[rightIndex]));\n return arr.slice(0, rightIndex + 1);\n};", + "es5": "var dropRightWhile = function dropRightWhile(arr, func) {\n var rightIndex = arr.length;\n\n while (rightIndex-- && !func(arr[rightIndex])) {\n ;\n }\n\n return arr.slice(0, rightIndex + 1);\n};", "example": "dropRightWhile([1, 2, 3, 4], n => n < 3); // [1, 2]" }, "tags": [ @@ -1540,7 +1540,7 @@ }, "meta": { "archived": false, - "hash": "2ae245946d7c0d704aa1bbadf43afad388c09ac5dba409439b8ea79c1d4ad944" + "hash": "3ce42322e5de148e0000781954289a75f19453def5a75de07e56a0d1cd0987ae" } }, { diff --git a/vscode_snippets/snippets.json b/vscode_snippets/snippets.json index 044082172..7501edb34 100644 --- a/vscode_snippets/snippets.json +++ b/vscode_snippets/snippets.json @@ -668,8 +668,9 @@ "prefix": "30s_dropRightWhile", "body": [ "const dropRightWhile = (arr, func) => {", - " while (arr.length > 0 && !func(arr[arr.length - 1])) arr = arr.slice(0, -1);", - " return arr;", + " let rightIndex = arr.length;", + " while (rightIndex-- && !func(arr[rightIndex]));", + " return arr.slice(0, rightIndex + 1);", "};" ], "description": "Removes elements from the end of an array until the passed function returns `true`. Returns the remaining elements in the array.\n\nLoop through the array, using `Array.prototype.slice()` to drop the last element of the array until the returned value from the function is `true`.\nReturns the remaining elements"