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Fit some more things into 80 columns in the Perl 6 doc

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Samantha McVey 2017-02-06 23:36:02 -08:00
parent 6e00874000
commit 7f0fff0adf
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1 changed files with 20 additions and 18 deletions
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@ -125,8 +125,8 @@ hello-to; #=> Hello, World !
hello-to(); #=> Hello, World ! hello-to(); #=> Hello, World !
hello-to('You'); #=> Hello, You ! hello-to('You'); #=> Hello, You !
## You can also, by using a syntax akin to the one of hashes (yay unified syntax !), ## You can also, by using a syntax akin to the one of hashes
## pass *named* arguments to a `sub`. ## (yay unified syntax !), pass *named* arguments to a `sub`.
# They're optional, and will default to "Any". # They're optional, and will default to "Any".
sub with-named($normal-arg, :$named) { sub with-named($normal-arg, :$named) {
say $normal-arg + $named; say $normal-arg + $named;
@ -146,7 +146,7 @@ sub with-mandatory-named(:$str!) {
} }
with-mandatory-named(str => "My String"); #=> My String ! with-mandatory-named(str => "My String"); #=> My String !
with-mandatory-named; # run time error: "Required named parameter not passed" with-mandatory-named; # run time error: "Required named parameter not passed"
with-mandatory-named(3); # run time error: "Too many positional parameters passed" with-mandatory-named(3);# run time error:"Too many positional parameters passed"
## If a sub takes a named boolean argument ... ## If a sub takes a named boolean argument ...
sub takes-a-bool($name, :$bool) { sub takes-a-bool($name, :$bool) {
@ -169,9 +169,9 @@ my &s = &say-hello;
my &other-s = sub { say "Anonymous function !" } my &other-s = sub { say "Anonymous function !" }
# A sub can have a "slurpy" parameter, or "doesn't-matter-how-many" # A sub can have a "slurpy" parameter, or "doesn't-matter-how-many"
sub as-many($head, *@rest) { # `*@` (slurpy) will basically "take everything else". sub as-many($head, *@rest) { #`*@` (slurpy) will "take everything else"
# Note: you can have parameters *before* (like here) # Note: you can have parameters *before* a slurpy one (like here),
# a slurpy one, but not *after*. # but not *after*.
say @rest.join(' / ') ~ " !"; say @rest.join(' / ') ~ " !";
} }
say as-many('Happy', 'Happy', 'Birthday'); #=> Happy / Birthday ! say as-many('Happy', 'Happy', 'Birthday'); #=> Happy / Birthday !
@ -224,7 +224,7 @@ say $x; #=> 52
# - `if` # - `if`
# Before talking about `if`, we need to know which values are "Truthy" # Before talking about `if`, we need to know which values are "Truthy"
# (represent True), and which are "Falsey" (or "Falsy") -- represent False. # (represent True), and which are "Falsey" (or "Falsy") -- represent False.
# Only these values are Falsey: 0, (), {}, "", Nil, A type (like `Str` or `Int`), # Only these values are Falsey: 0, (), {}, "", Nil, A type (like `Str` or `Int`)
# and of course False itself. # and of course False itself.
# Every other value is Truthy. # Every other value is Truthy.
if True { if True {
@ -265,13 +265,14 @@ say $age > 18 ?? "You are an adult" !! "You are under 18";
given "foo bar" { given "foo bar" {
say $_; #=> foo bar say $_; #=> foo bar
when /foo/ { # Don't worry about smart matching yet – just know `when` uses it. when /foo/ { # Don't worry about smart matching yet – just know `when` uses it
# This is equivalent to `if $_ ~~ /foo/`. # This is equivalent to `if $_ ~~ /foo/`.
say "Yay !"; say "Yay !";
} }
when $_.chars > 50 { # smart matching anything with True (`$a ~~ True`) is True, when $_.chars > 50 { # smart matching anything with True is True,
# i.e. (`$a ~~ True`)
# so you can also put "normal" conditionals. # so you can also put "normal" conditionals.
# This when is equivalent to this `if`: # This `when` is equivalent to this `if`:
# if $_ ~~ ($_.chars > 50) {...} # if $_ ~~ ($_.chars > 50) {...}
# Which means: # Which means:
# if $_.chars > 50 {...} # if $_.chars > 50 {...}
@ -288,7 +289,8 @@ given "foo bar" {
# but can also be a C-style `for` loop: # but can also be a C-style `for` loop:
loop { loop {
say "This is an infinite loop !"; say "This is an infinite loop !";
last; # last breaks out of the loop, like the `break` keyword in other languages last; # last breaks out of the loop, like the `break` keyword in other
# languages
} }
loop (my $i = 0; $i < 5; $i++) { loop (my $i = 0; $i < 5; $i++) {