質問編集履歴
2
追記②
test
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File without changes
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test
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@@ -167,3 +167,53 @@
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167
167
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}
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168
168
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169
169
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```
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170
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+
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171
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+
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172
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+
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173
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+
### 追記②
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174
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+
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175
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+
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176
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+
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177
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+
```Ruby
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178
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+
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179
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+
p hash_arr # [{"key"=>"value1"}, {"key"=>"value2"}]
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180
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+
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181
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+
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182
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+
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183
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+
hash_arr.each_with_index{|my_hash, index|
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184
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+
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185
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+
i = (index+1).to_s
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186
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+
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187
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+
my_hash.store("k"+i, "v"+i)
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188
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+
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189
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+
}
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190
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+
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191
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+
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192
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+
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193
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+
p hash_arr # [{"key"=>"value1", "k1"=>"v1"}, {"key"=>"value2", "k2"=>"v2"}]
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194
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+
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195
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+
```
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196
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+
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197
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+
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198
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+
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199
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+
```C#
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200
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+
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201
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+
List<int> list = new List<int> { 1, 2, 3 };
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202
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+
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203
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+
addList(list);
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204
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+
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205
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+
Console.WriteLine(String.Join(",", list)); // 1,2,3,4
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206
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+
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207
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+
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208
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+
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209
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+
void addList(List<int> list)
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210
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+
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211
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+
{
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212
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+
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213
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+
list.Add(4);
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214
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+
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215
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+
list = new List<int> { 0 };
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216
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+
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217
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+
}
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218
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+
|
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219
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+
```
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1
C#コード追記
test
CHANGED
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File without changes
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test
CHANGED
|
@@ -69,3 +69,101 @@
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69
69
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という理由なのではないかと考えていますが、こちらの認識で合っていますか？
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70
70
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71
71
|
ご教示お願いします。
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72
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+
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73
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+
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74
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+
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75
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+
### 追記
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|
76
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+
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77
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+
C#でも試してみました。
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78
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+
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79
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+
|
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80
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+
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81
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+
```C#
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82
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+
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|
83
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+
private void Form1_Load(object sender, EventArgs e)
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84
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+
|
|
85
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+
{
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|
86
|
+
|
|
87
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+
int[] numbers = new int[3] { 0, 1, 2 };
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|
88
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+
|
|
89
|
+
foreach (int number in numbers)
|
|
90
|
+
|
|
91
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+
{
|
|
92
|
+
|
|
93
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+
// number = 10; // エラー。foreachの繰り返し変数であるため、これに割り当てることはできない。
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|
94
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+
|
|
95
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+
// number += 10; // エラー。foreachの繰り返し変数であるため、これに割り当てることはできない。
|
|
96
|
+
|
|
97
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+
}
|
|
98
|
+
|
|
99
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+
|
|
100
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+
|
|
101
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+
for (int i = 0; i<numbers.Length; i++)
|
|
102
|
+
|
|
103
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+
{
|
|
104
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+
|
|
105
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+
if (i == numbers.Length - 1)
|
|
106
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+
|
|
107
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+
{
|
|
108
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+
|
|
109
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+
numbers[i] = 20;
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|
110
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+
|
|
111
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+
}
|
|
112
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+
|
|
113
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+
else
|
|
114
|
+
|
|
115
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+
{
|
|
116
|
+
|
|
117
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+
numbers[i] += 10;
|
|
118
|
+
|
|
119
|
+
}
|
|
120
|
+
|
|
121
|
+
}
|
|
122
|
+
|
|
123
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+
|
|
124
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+
|
|
125
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+
Console.WriteLine(String.Join(",", numbers)); // 10,11,30
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|
126
|
+
|
|
127
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+
|
|
128
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+
|
|
129
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+
int j = 1;
|
|
130
|
+
|
|
131
|
+
intAdd(j, 10);
|
|
132
|
+
|
|
133
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+
Console.WriteLine(j); // 1
|
|
134
|
+
|
|
135
|
+
|
|
136
|
+
|
|
137
|
+
int[] arr = new int[2] { 0, 1 };
|
|
138
|
+
|
|
139
|
+
arrAdd(arr);
|
|
140
|
+
|
|
141
|
+
Console.WriteLine(String.Join(",", arr)); // 5,6
|
|
142
|
+
|
|
143
|
+
|
|
144
|
+
|
|
145
|
+
}
|
|
146
|
+
|
|
147
|
+
|
|
148
|
+
|
|
149
|
+
void intAdd(int a, int b)
|
|
150
|
+
|
|
151
|
+
{
|
|
152
|
+
|
|
153
|
+
a += b;
|
|
154
|
+
|
|
155
|
+
}
|
|
156
|
+
|
|
157
|
+
|
|
158
|
+
|
|
159
|
+
void arrAdd(int[] arr)
|
|
160
|
+
|
|
161
|
+
{
|
|
162
|
+
|
|
163
|
+
arr[0] = 5;
|
|
164
|
+
|
|
165
|
+
arr[1] += 5;
|
|
166
|
+
|
|
167
|
+
}
|
|
168
|
+
|
|
169
|
+
```
|