Today I learned what precision Python floats have.
Today I (re)learned how to delete a file in Python with the module pathlib.
Today I (re)learned Heron's formula to compute the area of a triangle from its three sides.
⎕←⎕ucs 2∘⊥∘⌽¨ ↓7 (⊢⍴⍨⊣,⍨÷⍨∘≢) ⍎¨ '0001011001011100101110000111110', '0111010111011110101111010101101', '1100001100101110001011110011100', '0011100001110111010110001111110111011011'