...g a floating point number is [+-]?([0-9]*[.])?[0-9]+ This will match: 123 123.456 .456 See a working example If you also want to match 123. (a period with no decimal part), then you'll need a slightly longer expression: [+-]?([0-9]+([.][0-9]*)?|[.][0-9]+) See pkeller's answer for a fuller...

...tive parser (developer dependent threshold). One of my favourite examples PHP's split($pattern,$string) vs explode($delimiter,$string) - thankfully the former is getting depreciated, but lots of code used the former when they only needed the power of the later. Aggreed, RegEx's provide an easy too...

...自提的鲜果说，还是送菜上门的七天买菜网，都因为价格问题导致的盈利困境而歇业，价格是上门送菜的最大障碍，要么狂砸补贴，要么把量做大，维持开支，没有别的路。笔者接触过一些做上门送菜的创业者，往往会问第一个...

...1 - Setting You must install a MySQL driver before doing anything. Unlike PHP, Only the SQLite driver is installed by default with Python. The most used package to do so is MySQLdb but it's hard to install it using easy_install. Please note MySQLdb only supports Python 2. For Windows user, you can...

...ectly. Here's a good link to more symbols: danshort.com/HTMLentities/index.php?w=dingb – Nathan Prather Aug 26 '12 at 15:25 1 ...

微博为什么限制140字(附短信70字限制考)问题的提出申请过那么多的微博，数申请网易微博的动机最不纯，因为它的字数限制不是传说中的140字，而是163个字。当年觉得很可爱，于是就注...问题的提出 申请过那么多的微博，数申...

...的都是浮亏的。直到浮亏变盈。) 你的理解大体上没有问题。与以往单向投机的区别是：我并非在某个价位上有多笔持仓浮亏，而是，每一个持仓浮亏单，均是不同价格，且由于是对冲套利持仓，不担心绝对价格的暴涨暴跌，...

...。 在用户进行输入后如何使视的状态得到更新？这个问题在一个文档对应一个视图时是不存在的，但是现在有一个文档对应了两个视图，当在一个视上进行了 输入时如何保证另一个视也得到通知呢？MFC的做法是利用文档来处...

...constructors, you can use typeof:. typeof "Hello World"; // string typeof 123; // number If you're creating numbers and strings via a constructor, such as var foo = new String("foo"), you should keep in mind that typeof may return object for foo. Perhaps a more foolproof method of che...

...尔、巴赫书》。他极为深入研究了程序员每日都要面对的问题：递归、验证、证明和布尔代数。这是一本很出色的读物，难度不大，偶尔有挑战，一旦你要鏖战到底，将是非常值得的。 – Jonik 13. 《代码整洁之道》 推荐数...