Clean up Projece Euler solutions

extra/project-euler/042/042.factor

@@ -1,7 +1,7 @@
 ! Copyright (c) 2008 Aaron Schaefer.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: ascii io.files kernel math math.functions namespaces make
-    project-euler.common sequences splitting io.encodings.ascii ;
+USING: ascii io.encodings.ascii io.files kernel make math math.functions
+    namespaces project-euler.common sequences splitting ;
 IN: project-euler.042
 
 ! http://projecteuler.net/index.php?section=problems&id=42

extra/project-euler/043/043.factor

@@ -1,8 +1,7 @@
 ! Copyright (c) 2008 Aaron Schaefer.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: combinators.short-circuit hashtables kernel math
-    math.combinatorics math.parser math.ranges project-euler.common sequences
-    sorting sets ;
+USING: combinators.short-circuit kernel math math.combinatorics math.parser
+    math.ranges project-euler.common sequences sets sorting ;
 IN: project-euler.043
 
 ! http://projecteuler.net/index.php?section=problems&id=43
@@ -74,13 +73,13 @@ PRIVATE>
     1000 over <range> [ number>digits 3 0 pad-left ] map [ all-unique? ] filter ;
 
 : overlap? ( seq -- ? )
-    dup first 2 tail* swap second 2 head = ;
+    [ first 2 tail* ] [ second 2 head ] bi = ;
 
 : clean ( seq -- seq )
     [ unclip 1 head prefix concat ] map [ all-unique? ] filter ;
 
 : add-missing-digit ( seq -- seq )
-    dup natural-sort 10 swap diff first prefix ;
+    dup natural-sort 10 swap diff prepend ;
 
 : interesting-pandigitals ( -- seq )
     17 candidates { 13 11 7 5 3 2 } [
@@ -93,6 +92,6 @@ PRIVATE>
     interesting-pandigitals [ 10 digits>integer ] sigma ;
 
 ! [ euler043a ] 100 ave-time
-! 19 ms run / 1 ms GC ave time - 100 trials
+! 12 ms ave run time - 2.32 SD (100 trials)
 
 MAIN: euler043a

extra/project-euler/044/044.factor

@@ -31,7 +31,7 @@ IN: project-euler.044
     dup 3 * 1- * 2 / ;
 
 : sum-and-diff? ( m n -- ? )
-    2dup + -rot - [ pentagonal? ] bi@ and ;
+    [ + ] [ - ] 2bi [ pentagonal? ] bi@ and ;
 
 PRIVATE>
 
@@ -40,7 +40,7 @@ PRIVATE>
     [ first2 sum-and-diff? ] filter [ first2 - abs ] map infimum ;
 
 ! [ euler044 ] 10 ave-time
-! 8924 ms run / 2872 ms GC ave time - 10 trials
+! 5727 ms ave run time - 1102.38 SD (10 trials)
 
 ! TODO: this solution is ugly and not very efficient...find a better algorithm
 

extra/project-euler/076/076.factor

@@ -1,6 +1,6 @@
 ! Copyright (c) 2008 Eric Mertens.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: arrays assocs combinators kernel locals math math.order math.ranges
+USING: arrays assocs kernel locals.backend math math.order math.ranges
     sequences ;
 IN: project-euler.076
 
@@ -55,6 +55,6 @@ PRIVATE>
     100 (euler076) ;
 
 ! [ euler076 ] 100 ave-time
-! 704 ms run time - 100 trials
+! 560 ms ave run time - 17.74 SD (100 trials)
 
 MAIN: euler076

extra/project-euler/079/079.factor

@@ -1,7 +1,7 @@
 ! Copyright (c) 2008 Aaron Schaefer.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: assocs hashtables io.files kernel math math.parser
-namespaces make io.encodings.ascii sequences sets ;
+USING: assocs io.encodings.ascii io.files kernel make math math.parser
+    sequences sets ;
 IN: project-euler.079
 
 ! http://projecteuler.net/index.php?section=problems&id=79
@@ -58,7 +58,7 @@ PRIVATE>
     source-079 >edges topological-sort 10 digits>integer ;
 
 ! [ euler079 ] 100 ave-time
-! 2 ms run / 0 ms GC ave time - 100 trials
+! 1 ms ave run time - 1.41 SD (100 trials)
 
 ! TODO: prune and diff are relatively slow; topological sort could be
 ! cleaned up and generalized much better, but it works for this problem

extra/project-euler/092/092.factor

@@ -32,7 +32,7 @@ IN: project-euler.092
     0 swap [ dup zero? not ] [ 10 /mod sq -rot [ + ] dip ] [ ] while drop ;
 
 : chain-ending ( n -- m )
-    dup 1 = over 89 = or [ next-link chain-ending ] unless ;
+    dup [ 1 = ] [ 89 = ] bi or [ next-link chain-ending ] unless ;
 
 : lower-endings ( -- seq )
     567 [1,b] [ chain-ending ] map ;

extra/project-euler/common/common.factor

@@ -2,7 +2,7 @@
 ! See http://factorcode.org/license.txt for BSD license.
 USING: arrays kernel make math math.functions math.matrices math.miller-rabin
     math.order math.parser math.primes.factors math.ranges sequences
-    sequences.lib sorting unicode.case ;
+    sequences.lib sorting strings unicode.case ;
 IN: project-euler.common
 
 ! A collection of words used by more than one Project Euler solution