Activities on BFE.dev

2026-8-30 - xsIv555 solved 105. typeof .

2026-8-30 - Ppf1D3B solved 106. Find two numbers that sum up to 0 .

2026-8-30 - xsIv555 solved 99. closure .

2026-8-30 - Ppf1D3B solved 105. find the first duplicate character in a string .

2026-8-30 - xsIv555 solved 104. Inheritance .

2026-8-30 - Ppf1D3B solved 104. Traverse DOM level by level .

2026-8-30 - xsIv555 solved 79. Equal III .

2026-8-30 - Ppf1D3B solved 102. validate string of parentheses .

2026-8-30 - Ppf1D3B solved 100. detect circle in linked list .

2026-8-30 - Ppf1D3B solved 97. compress a string .

2026-8-30 - Ppf1D3B solved 96. count "1" in binary form .

2026-8-30 - Ppf1D3B solved 94. implement your own `Object.create` .

2026-8-30 - VLLJCWI solved 120. create `isPrime()` .

2026-8-30 - Ppf1D3B solved 93. Generate Fibonacci Number with recursion .

2026-8-30 - Ppf1D3B solved 91. invert a binary tree .

2026-8-30 - Ppf1D3B solved 89. Next Right Sibling .

2026-8-30 - vBmNXF8 solved 8. can you shuffle() an array? .

2026-8-30 - Ppf1D3B solved 87. longest substring with unique characters .

2026-8-30 - Ppf1D3B solved 82. find available meeting slots .

2026-8-30 - Ppf1D3B solved 81. merge sorted arrays .