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annotate modules/list.tp @ 308:56deb4a102db

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Added filter to list
author Michael Pavone <pavone@retrodev.com>
date Mon, 28 Jul 2014 03:29:27 -0700
parents ea94b1e43c97
children dfd204c82849
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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 filter <- :pred { self }
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8 foreach <- :self fun { self }
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9 map <- :fun { self }
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10 | <- :val {
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11 list node: val withTail: self
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12 }
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13 . <- :right { right }
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14 reverse <- { self }
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15 join <- { "" }
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16 contains? <- :val { false }
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17 string <- { "[]" }
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18 print <- { print: string }
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19 jsonEncode <- { "[]" }
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20 }
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21 #{
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22 empty <- { _empty }
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23 node:withTail <- :_val :_tail {
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24 #{
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25 value <- { _val }
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26 tail <- { _tail }
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27 empty? <- { false }
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28 length <- {
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29 fold: 0 with: :acc val { acc + 1 }
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30 }
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31 fold:with <- :acc :fun {
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32 cur <- self
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33 while: { not: (cur empty?)} do: {
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34 acc <- fun: acc (cur value)
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35 cur <- cur tail
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36 }
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37 acc
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38 }
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39 foldr:with <- :acc fun {
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40 fun: (_tail foldr: acc with: fun) _val
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41 }
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42 filter <- :pred {
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43 reverse: (fold: [] with: :acc el {
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44 if: (pred: el) { el | acc } else: { acc }
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45 })
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46 }
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47 map <- :fun {
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48 node: (fun: _val) withTail: (_tail map: fun)
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49 }
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50 foreach <- :self fun {
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51 fold: 0 with: :idx el{
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52 fun: idx el
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53 idx + 1
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54 }
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55 self
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56 }
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57 | <- :val {
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58 node: val withTail: self
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59 }
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60 . <- :right {
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61 foldr: right with: :tail val {
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62 node: val withTail: tail
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63 }
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64 }
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65 reverse <- {
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66 fold: [] with: :tail val {
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67 node: val withTail: tail
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68 }
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69 }
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70 join <- :sep {
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71 _tail fold: (string: _val) with: :acc el {
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72 acc . sep . el
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73 }
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74 }
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75 contains? <- :val {
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76 if: _val = val {
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77 true
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78 } else: {
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79 _tail contains?: val
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80 }
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81 }
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82 string <- {
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83 (fold: "[\n" with: :acc el {
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84 acc . " " . (string: el) . "\n"
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85 }) . "]"
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86 }
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87 print <- {
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88 print: "[\n"
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89 foreach: :_ el {
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90 print: " " . (string: el) . "\n"
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91 }
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92 print: "]"
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93 }
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94
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95 jsonEncode <- {
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96 parts <- map: :el { json encode: el }
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97 "[" . (parts join: ",") . "]"
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98 }
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99 }
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100 }
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101 }
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102 }