Avoid Yoda conditions in Perl you should

Paul VanDerWerf from Brunswick, Maine, USA, CC BY 2.0, via Wikimedia Commons

I remem­ber a brief time in the mid-​2000s insist­ing on so-​called ​“Yoda con­di­tions” in my Perl. I would place con­stants to the left of equal­i­ty com­par­isons. In case I acci­den­tal­ly typed a sin­gle = instead of ==, the com­pil­er would catch it instead of blithe­ly assign­ing a vari­able. E.g.:

if ( $foo == 42 ) { ... } # don’t do this
if ( 42 == $foo ) { ... } # do this
if ( $foo =…