Mercurial > repos > tabletprog
annotate modules/list.tp @ 300:ea94b1e43c97
Add foreach to empty list
author | Michael Pavone <pavone@retrodev.com> |
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date | Fri, 25 Jul 2014 13:43:25 -0700 |
parents | bb4723fec05e |
children | 56deb4a102db |
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1 { |
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2 _empty <- #{ |
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3 length <- { 0 } |
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4 empty? <- { true } |
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5 fold:with <- :acc :fun { acc } |
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6 foldr:with <- :acc :fun { acc } |
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7 foreach <- :self fun { self } |
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8 map <- :fun { self } |
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9 | <- :val { |
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10 list node: val withTail: self |
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11 } |
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12 . <- :right { right } |
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13 reverse <- { self } |
188 | 14 join <- { "" } |
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15 contains? <- :val { false } |
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16 string <- { "[]" } |
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17 print <- { print: string } |
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18 jsonEncode <- { "[]" } |
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19 } |
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20 #{ |
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21 empty <- { _empty } |
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22 node:withTail <- :_val :_tail { |
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23 #{ |
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24 value <- { _val } |
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25 tail <- { _tail } |
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26 empty? <- { false } |
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27 length <- { |
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28 fold: 0 with: :acc val { acc + 1 } |
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29 } |
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30 fold:with <- :acc :fun { |
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31 cur <- self |
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32 while: { not: (cur empty?)} do: { |
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33 acc <- fun: acc (cur value) |
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34 cur <- cur tail |
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35 } |
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36 acc |
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37 } |
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38 foldr:with <- :acc fun { |
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39 fun: (_tail foldr: acc with: fun) _val |
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40 } |
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41 map <- :fun { |
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42 node: (fun: _val) withTail: (_tail map: fun) |
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43 } |
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44 foreach <- :self fun { |
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45 fold: 0 with: :idx el{ |
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46 fun: idx el |
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47 idx + 1 |
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48 } |
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49 self |
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50 } |
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51 | <- :val { |
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52 node: val withTail: self |
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53 } |
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54 . <- :right { |
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55 foldr: right with: :tail val { |
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56 node: val withTail: tail |
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57 } |
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58 } |
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59 reverse <- { |
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60 fold: [] with: :tail val { |
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61 node: val withTail: tail |
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62 } |
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63 } |
188 | 64 join <- :sep { |
65 _tail fold: (string: _val) with: :acc el { | |
66 acc . sep . el | |
67 } | |
68 } | |
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69 contains? <- :val { |
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70 if: _val = val { |
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71 true |
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72 } else: { |
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73 _tail contains?: val |
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74 } |
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75 } |
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76 string <- { |
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77 (fold: "[\n" with: :acc el { |
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78 acc . " " . (string: el) . "\n" |
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79 }) . "]" |
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80 } |
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81 print <- { |
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82 print: "[\n" |
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83 foreach: :_ el { |
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84 print: " " . (string: el) . "\n" |
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85 } |
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86 print: "]" |
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87 } |
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88 |
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89 jsonEncode <- { |
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90 parts <- map: :el { json encode: el } |
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91 "[" . (parts join: ",") . "]" |
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92 } |
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93 } |
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94 } |
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95 } |
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96 } |