RadwaKamal

#!/usr/bin/env python

#Simple python script to change lower camel case strings in a file to snake case
import sys
import re

#detect if the string is lower camel case
def is_camel(word):
    bol = re.search('\w([a-z][A-Z])', word)
    return bol

RadwaKamal

#!/bin/bash
target=(_posts/*.md)
prv_last_file=`cat last_file.txt`
tag_template=`cat tag_template.md`

for ((i=${#target[@]}-1; i>=0; i--)); do
    if [ "$prv_last_file" == "${target[$i]}" ]; then
        echo ${target[${#target[@]}-1]} > last_file.txt
        echo "We are done, Thank you!"
        break

RadwaKamal

Valid Parentheses

Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An input string is valid if:

1. Open brackets must be closed by the same type of brackets.
2. Open brackets must be closed in the correct order.
3. Every close bracket has a corresponding open bracket of the same type.

Examples

RadwaKamal

Longest Substring Without Repeating Characters

Given a string s, find the length of the longest substring without repeating characters.

Examples

"abcabcbb"  → 3  ("abc")
"bbbbb"     → 1  ("b")
"pwwkew"    → 3  ("wke")
"" → 0

RadwaKamal

Design a system where an admin can trigger a machine learning model training job from a desktop application and check on its status later. Because training can take several minutes, this does not need to be real-time.

To give you some architectural context, the system is split into two parts:

• A Core Service: This is our main backend API. It handles user requests, and receives the initial 'Train' request from the desktop app.

• An ML Service: This is a separate service responsible for training the ML model.

---

Your Task