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  1. import std.stdio;
  2. void main() {
  3.     int[] original;
  4.     original.reserve(5);
  5.     writeln("orig cap: ", original.capacity);
  6.     writeln("orig len: ", original.length);
  7.  
  8.     auto ptr = original.ptr;
  9.     original ~= 0;
  10.     original ~= 1;
  11.     original ~= 2;
  12.     writeln("orig cap: ", original.capacity); // 7
  13.     writeln("orig len: ", original.length); // 3
  14.     assert(ptr == original.ptr);
  15.  
  16.     auto slice = original[1..$];
  17.     writeln("slice cap: ", slice.capacity); // 6
  18.     writeln("slice len: ", slice.length); // 2
  19.     original[0]++;
  20.     slice[0]++;
  21.     slice[1]++;
  22.     writeln("orig: ", original); // [1, 2, 3]
  23.  
  24.     slice ~= 4;
  25.     writeln("orig cap: ", original.capacity); // 0
  26.     writeln("orig len: ", original.length); // 3
  27.     writeln("slice cap: ", slice.capacity); // 6
  28.     writeln("slice len: ", slice.length); // 3
  29.     writeln("slice: ", slice); // [2, 3, 4]
  30.  
  31.     original ~= -1;
  32.     writeln("orig: ", original); // [1, 2, 3, -1]
  33.     writeln("slice: ", slice); // [2, 3, 4]
  34.  
  35.     slice = original[1..$];
  36.     slice ~= 4;
  37.     writeln("slice: ", slice); // [2, 3, -1, 4]
  38.     assumeSafeAppend(original);
  39.     original ~= -1;
  40.     writeln("orig: ", original); // [1, 2, 3, -1, -1]
  41.     writeln("slice: ", slice); // [2, 3, -1, -1]
  42.  
  43.     auto str = "Hello World";
  44.     const(char)[] strSlice = str[0..5];
  45.     strSlice ~= "/bye";
  46.     writeln(str); // "Hello World"
  47.  
  48. }
Success #stdin #stdout 0.02s 2080KB
comments (?)
stdin
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Standard input is empty
stdout
copy 
orig cap: 7
orig len: 0
orig cap: 7
orig len: 3
slice cap: 6
slice len: 2
orig: 1 2 3
orig cap: 0
orig len: 3
slice cap: 6
slice len: 3
slice: 2 3 4
orig: 1 2 3 -1
slice: 2 3 4
slice: 2 3 -1 4
orig: 1 2 3 -1 -1
slice: 2 3 -1 -1
Hello World
https://ideone.com/yZZvTx
language:
D (dmd 2.085.0)
created:
10 years ago
visibility:
public

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