Questions tagged «decrement»


10
“!-”在JavaScript中有什么作用?
我有这段代码(取自这个问题): var walk = function(dir, done) { var results = []; fs.readdir(dir, function(err, list) { if (err) return done(err); var pending = list.length; if (!pending) return done(null, results); list.forEach(function(file) { file = path.resolve(dir, file); fs.stat(file, function(err, stat) { if (stat && stat.isDirectory()) { walk(file, function(err, res) { results = results.concat(res); …

11
Xcode 7.3已弃用“ ++”和“-”运算符
我正在查看Xcode 7.3注释,并且注意到了这个问题。 ++和-运算符已被弃用 有人可以解释为什么不推荐使用它吗?我说对了,现在在新版本的Xcode中,您将使用它代替++它x += 1; 例: for var index = 0; index < 3; index += 1 { print("index is \(index)") }
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