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adventofcode2023
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add more helpers 

llen and slen to get the length of a list or string.
trim, replace and splitstr for common string operations.
main
magical 2023-12-13 07:11:53 +00:00
parent b99ad03de5
commit 632022d073
2 changed files with 17 additions and 6 deletions
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12
day13/sol.tcl
View File

@ -2,7 +2,7 @@
source ../prelude.tcl source ../prelude.tcl
set input stdin set input stdin
set patterns [split [string map {"\n\n" "|"} [string trim [read $input]]] "|"] set patterns [splitstr [trim [read $input]] "\n\n"]
set patterns [lmap p $patterns {split $p "\n"}] set patterns [lmap p $patterns {split $p "\n"}]
puts "$patterns" puts "$patterns"
@ -10,9 +10,9 @@ proc reflect pattern {
set total 0 set total 0
foreach pat [list $pattern [transpose $pattern]] factor {100 1} { foreach pat [list $pattern [transpose $pattern]] factor {100 1} {
#puts "reflect $pat" #puts "reflect $pat"
for {set i 1} {$i < [llength $pat]} {incr i} { for {set i 1} {$i < [llen $pat]} {incr i} {
set ok 1 set ok 1
for {set j 0} {$i + $j < [llength $pat] && $i-$j-1 >= 0} {incr j} { for {set j 0} {$i + $j < [llen $pat] && $i-$j-1 >= 0} {incr j} {
if {[lindex $pat $i+$j] ne [lindex $pat [expr {$i-$j-1}]]} { if {[lindex $pat $i+$j] ne [lindex $pat [expr {$i-$j-1}]]} {
set ok 0 set ok 0
break break
@ -32,9 +32,9 @@ proc fix pattern {
foreach pat [list $pattern [transpose $pattern]] factor {100 1} { foreach pat [list $pattern [transpose $pattern]] factor {100 1} {
#puts "reflect $pat" #puts "reflect $pat"
array unset smudges array unset smudges
for {set i 1} {$i < [llength $pat]} {incr i} { for {set i 1} {$i < [llen $pat]} {incr i} {
set diff 0 set diff 0
for {set j 0} {$i + $j < [llength $pat] && $i-$j-1 >= 0} {incr j} { for {set j 0} {$i + $j < [llen $pat] && $i-$j-1 >= 0} {incr j} {
incr diff [distance [lindex $pat $i+$j] [lindex $pat [expr {$i-$j-1}]]] incr diff [distance [lindex $pat $i+$j] [lindex $pat [expr {$i-$j-1}]]]
if {$diff > 1} break if {$diff > 1} break
} }
@ -64,7 +64,7 @@ proc column {lst i} {
} }
proc transpose pat { proc transpose pat {
set C [string length [lindex $pat 0]] set C [slen [lindex $pat 0]]
set out {} set out {}
for {set i 0} {$i < $C} {incr i} { for {set i 0} {$i < $C} {incr i} {
lappend out [column $pat $i] lappend out [column $pat $i]

11
prelude.tcl
View File

@ -4,6 +4,11 @@ namespace import tcl::mathfunc::max
proc {#} args {} proc {#} args {}
proc llen {lst} { return [llength $lst] }
proc slen {str} { return [string length $str] }
proc trim args { return [uplevel [concat string trim $args]] }
proc replace {str a b} { return [string map [list $a $b] $str] }
proc ladd {list} { proc ladd {list} {
set t 0 set t 0
foreach x $list { incr t $x } foreach x $list { incr t $x }
@ -16,6 +21,12 @@ proc lmul {list} {
return $p return $p
} }
# split s on a substring
proc splitstr {s sep} {
# replace $sep with ascii char 30, aka "record separator"
return [split [replace $s $sep "\x1E"] "\x1E"]
}
proc must_regexp args { proc must_regexp args {
if {! [uplevel [concat regexp $args]]} { if {! [uplevel [concat regexp $args]]} {
error "regexp failed" error "regexp failed"