Programmer Humor

34381 readers

404 users here now

Post funny things about programming here! (Or just rant about your favourite programming language.)

Rules:

Posts must be relevant to programming, programmers, or computer science.
No NSFW content.
Jokes must be in good taste. No hate speech, bigotry, etc.

founded 5 years ago

MODERATORS

[email protected]

186

Like programming in bash (lemmy.ml)

submitted 1 week ago by [email protected] to c/[email protected]

26 comments fedilink hide all child comments

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 1 points 1 week ago (1 children)

Huh, seems you're right. I was under the impression this wouldn't work in dash but apparently that's wrong.

[–] [email protected] 1 points 1 week ago

Yep! The functionality for performing arithmetic expressions this way is called “arithmetic expansion”.

2.6.4 Arithmetic Expansion

Arithmetic expansion provides a mechanism for evaluating an arithmetic expression and substituting its value. The format for arithmetic expansion shall be as follows:

$((expression))

The expression shall be treated as if it were in double-quotes, except that a double-quote inside the expression is not treated specially. The shell shall expand all tokens in the expression for parameter expansion, command substitution, and quote removal.

Next, the shell shall treat this as an arithmetic expression and substitute the value of the expression. […]

https://pubs.opengroup.org/onlinepubs/9799919799/utilities/V3_chap02.html#tag_19_06_04