Tutorial by Examples

Erroneous code, can you spot why this usage of key will lead to bugs?

var pipeline = {}; // (...) adding things in pipeline for(var key in pipeline) { fs.stat(pipeline[key].path, function(err, stats) { if (err) { // clear that one delete pipeline[key]; return; } // (...) pipeline[key].count++; }); } The problem i...

JavaScript • How to make iterator usable inside async callback function

Correct Writing

var pipeline = {}; // (...) adding things in pipeline var processOneFile = function(key) { fs.stat(pipeline[key].path, function(err, stats) { if (err) { // clear that one delete pipeline[key]; return; } // (...) pipeline[key].count++; }); }; ...

JavaScript • How to make iterator usable inside async callback function

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