callback-hell.js
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| a(b, function(err, c) { | |
| // wait for a to finish. | |
| d(c, function(err, e) { | |
| // wait for d to finish. | |
| f(e, function(err, g) { | |
| // do something with the result of f. | |
| }) | |
| }) | |
| }) |
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