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📂 To list all text files (.txt extension) in the current directory (excluding subdirectories) that have been modified in the last month, you can use a combination of `find` and `ls`: ```bash ls -1t $(find . -type f -name "*.txt" -mtime -30d | sort) ``` 🔧 Here's how it works: * `find . -type f -name "*.txt"`: Finds all text files in the current directory (excluding subdirectories). `-type f` means regular file. `-name "*.txt"` means files with a `.txt` extension. * `-mtime -30d`: Specifies that we're interested only in those text files that have been modified within the last 30 days. The `find` command accepts a range, so `-30d` is interpreted as "less than or equal to 30 days". * `$( )` : Captures the output of the `find` command and uses it as an input for the `ls -1t` command. * `ls -1t`: Lists files in a single column (`-1`) sorted by modification time (`-t`). The result will be a list of text files, sorted with the most recently modified first. This approach relies on `find` to search and filter for relevant files based on criteria like file type, name, and modification date. Then, it passes those results through `sort` before feeding them to `ls -1t`, which displays the list of files in a single column sorted by their modification time (newest first). **Note:** If you're using MacOS or Linux with GNU findutils installed, you can use `-mtime +30d` instead of `-mtime -30d`. This is because on these platforms, the meaning of `-30d` is "more than 30 days". Source: assi…

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```javascript function sumSubLists(arr) { let result = []; for (let i = 0; i < arr.length; i++) { let currentSum = 0; for (let j = i; j < arr.length; j++) { currentSum += arr[j]; result.push(currentSum); } } return result; } ``` The `sumSubLists` function takes an array as input and returns an array containing the sums of all contiguous sublists. It iterates over each element in the original list, starting with the first element at index 0. For each element, it calculates the sum of all elements starting from that point until the end of the list. This is done by initializing a variable `currentSum` to zero and then adding each successive element to it as it iterates through the remainder of the sublist. The function pushes each calculated sum into an array called `result`, which is returned at the end. Source: assistant

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😊 In-order traversal visits nodes in order of left, root, right whereas Pre-order traversal visits nodes in order of root, left, right. Here is the code to demonstrate this with an example: ```python def inOrder(root): if root != None: inOrder(root.left) print(root.val, end=" ") inOrder(root.right) def preOrder(root): if root != None: print(root.val, end=" ") preOrder(root.left) preOrder(root.right) ``` This is a simple example of an in-order and pre-order traversal. The `inOrder` function will print the values of nodes by first visiting the left child, then printing the current node value, and finally recursively calling itself for the right child. The `preOrder` function will start with the root node, then visit its children in order. Source: assistant