回答編集履歴
3
関数名変更
test
CHANGED
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@@ -4,7 +4,7 @@
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4
4
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5
5
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6
6
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7
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-
def find_ho
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7
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+
def find_neighbor(list, a)
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8
8
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9
9
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con2 = list.each_cons(2)
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10
10
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@@ -12,10 +12,10 @@
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12
12
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13
13
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end
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14
14
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15
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-
p find_ho
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15
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+
p find_neighbor(list, 300) # => [200,500]
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16
16
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17
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-
p find_ho
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17
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+
p find_neighbor(list, 50) # => [100]
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18
18
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19
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-
p find_ho
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19
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+
p find_neighbor(list, 1000) # => [500]
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20
20
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21
21
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```
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2
修正
test
CHANGED
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@@ -1,19 +1,21 @@
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1
1
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```ruby
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2
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-
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3
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-
a = 300
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4
2
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5
3
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list = [50, 100, 200, 300, 500, 1000]
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6
4
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7
5
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8
6
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9
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-
i
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7
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+
def find_hoge(list, a)
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10
8
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9
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+
con2 = list.each_cons(2)
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10
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+
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11
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-
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11
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+
con2.find_all{|x,y| x == a}.map{|x,y| y} + con2.find_all{|x,y| y == a}.map{|x,y| x}
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12
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+
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13
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+
end
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14
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+
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15
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+
p find_hoge(list, 300) # => [200,500]
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16
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+
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17
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+
p find_hoge(list, 50) # => [100]
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18
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+
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19
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+
p find_hoge(list, 1000) # => [500]
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12
20
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13
21
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```
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14
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-
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15
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-
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16
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-
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17
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-
**追記**
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18
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-
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19
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-
端っこの部分についてがまだ上手くいってないので、後で追記しときます。
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1
追記
test
CHANGED
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@@ -6,6 +6,14 @@
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6
6
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7
7
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8
8
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9
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+
ifnone = proc{}
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10
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+
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9
11
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p list.each_cons(3).find{|x,y,z| y == a}.yield_self{|x,y,z| [x,z]}
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10
12
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11
13
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```
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14
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+
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15
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+
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16
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+
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17
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+
**追記**
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18
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+
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19
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+
端っこの部分についてがまだ上手くいってないので、後で追記しときます。
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