Closures/Value capture: Difference between revisions
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(Added another C# example that doesn't use Linq) |
(Added some comments to explain how we avoid the closure trap) |
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for ( int i = 0; i < 10; ++i ) |
for ( int i = 0; i < 10; ++i ) |
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{ |
{ |
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// This is key to avoiding the closure trap, because |
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// the anonymous delegate captures a reference to |
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// outer variables, not their value. So we create 10 |
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// variables, and each created anonymous delegate |
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// has references to that variable, not the loop variable |
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var captured_val = i; |
var captured_val = i; |
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l.Add( delegate() { return captured_val * captured_val; } ); |
l.Add( delegate() { return captured_val * captured_val; } ); |
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