rat | Compose shell commands to build interactive terminal | Command Line Interface library

I have a webpage which receives data from a realtime database using the following javascript code:

I am reading Adam Drozdek's book on DSA, and in solving the mouse in maze problem, he is using stacks. But how would I (if i wanted) count the number of steps the rat takes ? Because according to his stack solution , false positive neighbors (ie. the neigbors that failed to reach destination) also get marked, and there is no backtracking which unmarks these cells. Pls help me. Pls.

EDIT: his algorithm

I have written a perl script to read an input file line-by-line for a given search string. I have done two implementations using the inbuilt perl functions grep and index, but I'm not able to get the output for the exact string match.

My sample code, input file and the desired output is shown below. Please help me understand the issue with this script which can help me to get the required output.

SAMPLE_CODE

I have the below code that takes my standardized .txt file and converts it into a JSON file perfectly. The only problem is that sometimes I have over 300 files and doing this manually (i.e. changing the number at the end of the file and running the script is too much and takes too long. I want to automate this. The files as you can see reside in one folder/directory and I am placing the JSON file in a differentfolder/directory, but essentially keeping the naming convention standardized except instead of ending with .txt it ends with .json but the prefix or file names are the same and standardized. An example would be: CRAZY_CAT_FINAL1.TXT, CRAZY_CAT_FINAL2.TXT and so on and so forth all the way to file 300. How can I automate and keep the file naming convention in place, and read and output the files to different folders/directories? I have tried, but can't seem to get this to iterate. Any help would be greatly appreciated.

Given this simple dataset:

In a large corpus of text, I am interested in extracting every sentence which has a specific list of (Verb-Noun) or (Adjective-Noun) somewhere in the sentence. I have a long list but here is a sample. In my MWE I am trying to extract sentences with "write/wrote/writing/writes" and "book/s". I have around 30 such pairs of words.

Here is what I have tried but it's not catching most of the sentences:

I have this dataset:

We're working on a project where we support extrapolation expressions from strings. Under the hood we're using Symfony's Expression Language to provide context parsing, but we're the ones extracting expressions from strings.

I would like to preface this by saying, I am no expert at regular expressions. My working knowledge is limited, and so the following regex will appear clunky and inelegant:

/\${(.*?)}(?=[\s\w\-_\/\\:;,.?!()|"\]&]|$)/

The theory is thus:

1. An expression starts with ${. This is the starting anchor.
2. Match anything in there.
3. The expression ends with a closing } that is followed by either a line end $, or one of the items from the character list.

Consider an expression that looks like this:

His name is "${name}", and he's a "${thing}".

The regex will successfully match the expressions name and thing, and will replace those with values from a value object.

However, if we take into account that users can also parse actual expressions and values, given this:

${{"name": "Pack Rat", "mana_cost": "{1}{B}", "cmc": 2}}

Meaning, evaluate that expression to a JSON object, the regex fails because it stops at the }" sequence in the part {1}{B}, and matching only {"name": "Pack Rat", "mana_cost": "{1}{B. Removing " as a possible stopping point in the lookahead character list fixes the JSON, but then it fails to extract the two expressions from the regular sentence.

Would it be possible to avoid premature stopping of this expression parser? Or is this something that is beyond the scope of a single regular expression?

I have connected MongoDB in pyspark notebook in databricks and then