The Haskell 98 Report has a section on Operator Applications that clears it up: An operator is either an operator symbol, such as + or $$, or is an ordinary identifier enclosed in grave accents (backquotes), such as `op`. For example, instead of writing the prefix application op x y, one can write the infix … Read more
It is hard to implement this using the bitwise or operator because pandas.DataFrame implements it. If you don’t mind replacing | with >>, you can try this: import pandas as pd def select(df, *args): cols = [x for x in args] return df[cols] def rename(df, **kwargs): for name, value in kwargs.items(): df = df.rename(columns={‘%s’ % … Read more
I found a solution. Scala reference says in section 6.12.3 Infix Operations: The associativity of an operator is determined by the operator’s last character. Operators ending in a colon ‘:’ are right-associative. All other operators are left-associative. Therefore it was enough to rename >> to >>:. It took me some time to realize that while … Read more
I personally do not have any hard and fast rules for this, but I tend to use infix notation only with symbolic method names, and dot notation for alphanumeric ones. Infix notation makes it cumbersome to modify code later. Here are some examples. Imagine you have this line of code: xs filter { f } … Read more
Quite late, but here is the answer. Take two stacks: operator stack { for operators and parentheses }. operand stack. Algorithm If character exists to be read: If character is operand push on the operand stack, if character is (, push on the operator stack. Else if character is operator While the top of the … Read more
Assembler 427 bytes Obfuscated, assembled with the excellent A86 into a .com executable: dd 0db9b1f89h, 081bee3h, 0e8af789h, 0d9080080h, 0bdac7674h, 013b40286h dd 07400463ah, 0ccfe4508h, 08ce9f675h, 02fc8000h, 013b0057eh, 0feaac42ah dd 0bedf75c9h, 0ba680081h, 04de801h, 04874f73bh, 04474103ch, 0e8e8b60fh dd 08e8a003fh, 0e880290h, 0de0153h, 08b57e6ebh, 0d902a93eh, 046d891dh dd 08906c783h, 05f02a93eh, 03cffcee8h, 057197510h, 02a93e8bh, 08b06ef83h dd 05d9046dh, 02a93e89h, 03bc9d95fh, 0ac0174f7h, 074f73bc3h, 0f3cac24h … Read more