fascinating. He discovered hash tables after he released TurboPascal 1.0 and used them 2.0; https://youtu.be/K3qf8gRFESU?t=3265. So perhaps Anders of TurboPascal 1.0 can't pass certain leetcode challenges :)
Borland Pascal v7.0 27th October 1992
Turbo Pascal for Windows v1.5 8th June 1992
Turbo Pascal for Windows v1.0 13th February 1991
Turbo Pascal v6.0 23rd October 1990
Turbo Pascal v5.5 2nd May 1989
Turbo Pascal v5.0 24th August 1988
Turbo Pascal v4.0 20th November 1987
Turbo Pascal v3.0 17th September 1986
Turbo Pascal v2.0 17th April 1984
Turbo Pascal v1.0 20th November 1983Young Anders Hejlsberg at age 28 in an interview...
https://community.embarcadero.com/files/2008/11/tp01_868.jpg
https://community.embarcadero.com/files/2008/11/tp02_871.jpg
https://community.embarcadero.com/files/2008/11/tp03_874.jpg
https://community.embarcadero.com/files/2008/11/tp04_877.jpg
"Borland says version 4.0 will outperform previous versions in compilation speed and efficiency. I compared 3.0 and my preliminary version of 4.0 in compiling the CALC.PAS program provided with Turbo Pascal. On a 4.77 MHz IBM PC with 512K bytes of RAM and an 8087 co processor, version 3.0 took 15 seconds to compile the 1272 line program. Turbo Pascal version 4.0 took just 10 seconds to compile a slightly different 1273 line version of CALC.PAS."
…he stated (in that interview) using hash tables within the compiler as of v2.0? yes! ;-)
What I mean here is that Anders probably remembers that wrong which is absolutely ok, thats now what… 35 years ago…