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快速理解 高频对冲套利自动交易（程式化交易） - 更多技术 - 清泛网 - 专注...
...“机器在玩人，不是人在玩机器”。
就当我是自言自语吧，呵呵。我只是将我现在正在做的事情，与需要的人做一些分享。
我在东航的账户，这段时间，可以在后台看到，在8点59分到9点之间，1、2秒钟内，连续10多个报单同...
What is an undefined reference/unresolved external symbol error and how do I fix it?
... token is converted into a token. (2.7). The
resulting tokens are syntactically and semantically analyzed and
translated as a translation unit. [SNIP]
Translated translation units and instantiation units are combined as follows: [SNIP]
All external entity references are resolved. Library components ...
What's a correct and good way to implement __hash__()?
...be integers, and there aren't too many of them, I suppose you could potentially run slightly faster with some home-rolled hash, but it likely wouldn't be as well distributed. hash((self.attr_a, self.attr_b, self.attr_c)) is going to be surprisingly fast (and correct), as creation of small tuples is ...
Generic deep diff between two objects
... },
isFunction: function (x) {
return Object.prototype.toString.call(x) === '[object Function]';
},
isArray: function (x) {
return Object.prototype.toString.call(x) === '[object Array]';
},
isDate: function (x) {
return Object.prototype.toString.call(x) === '[ob...
Django: multiple models in one template using forms [closed]
...eparate project) OR creating a new Customer, then creating a Ticket and finally creating a Note assigned to the new ticket.
...
Downloading Java JDK on Linux via wget is shown license page instead
...2b6607d096fa80163/jdk-8u131-linux-x64.rpm > jdk-8u112-linux-x64.rpm
In all cases above, subst 'i586' for 'x64' to download the 32-bit build.
-j -> junk cookies
-k -> ignore certificates
-L -> follow redirects
-H [arg] -> headers
curl can be used in place of wget.
UPDATE FOR JDK 7u7...
Uber5岁了，一次性告诉你它的商业之道 - 资讯 - 清泛网 - 专注C/C++及内核技术
...的，大家都觉得好，就立即执行了，全程可能也就40分钟吧。”王晓峰告诉《中国新闻周刊》。
至于“一键呼叫佟大为”，从创意到执行大约用了两个星期，最近这次“一键呼叫一个亿”，用时算长的——1个月。
每个城市主...
Representing graphs (data structure) in Python
...f._graph[node2].add(node1)
def remove(self, node):
""" Remove all references to node """
for n, cxns in self._graph.items(): # python3: items(); python2: iteritems()
try:
cxns.remove(node)
except KeyError:
pass
tr...
How to find the JVM version from a program?
...
That JMX call returns the equivalent of "java.vm.version", not "java.version". These are usually (but not necessarily) the same.
– Alex Miller
Jun 21 '13 at 15:54
...
Calculate difference in keys contained in two Python dictionaries
...s:
diff = set(dictb.keys()) - set(dicta.keys())
Here is a class to find all the possibilities: what was added, what was removed, which key-value pairs are the same, and which key-value pairs are changed.
class DictDiffer(object):
"""
Calculate the difference between two dictionaries as:
...