In objective-c, this ^ No. What does it mean ah?

If that, please elaborate or give a good link, thank you.
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xcode document search blocks
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cited a floor darkdong reply:

xcode document search blocks

Agree
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Are blocks, and the python's lambda is very similar

http://sech.iteye.com/blog/897386
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blocks programming
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block
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Is a piece of code can be written to achieve a similar function in a function inside the function.
In order to facilitate reading the code.