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如何建立一套适合自己的高胜算交易系统 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...人若想在效率市场持续稳定的赢利，必须成功的解决两大问题：1、如何在高度随机的价格波动中寻找非随机的部分；2、如何有效的控制自身的心理弱点，使之不致影响自己的理性决策。很多投资家的实践都证明，交易系统在上...
Convert JavaScript string in dot notation into an object reference
...,'etc']) #works with both strings and lists
5
> index(obj,'a.b.etc', 123) #setter-mode - third argument (possibly poor form)
123
> index(obj,'a.b.etc')
123
...though personally I'd recommend making a separate function setIndex(...). I would like to end on a side-note that the original...
How to check if an object is a list or tuple (but not string)?
...
Python with PHP flavor:
def is_array(var):
return isinstance(var, (list, tuple))
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Validate that a string is a positive integer
...ue);
},
false
);
test("1", true);
test("1.23", false);
test("1234567890123", true);
test("1234567890123.1", false);
test("0123", false); // false because we don't handle leading 0s
test(" 123 ", false); // false because we don't handle whitespace
<label>
String:
<inp...
What is the @Html.DisplayFor syntax for?
.... It's still very applicable to MVC3:
http://www.dalsoft.co.uk/blog/index.php/2010/04/26/mvc-2-templates/
It's also useful if your Model has a Data annotation. For instance, if the property on the model is decorated with the EmailAddress data annotation, DisplayFor will render it as a mailto: li...
Can I replace groups in Java regex?
...s) {
// replace with "%" what was matched by group 1
// input: aaa123ccc
// output: %123ccc
System.out.println(replaceGroup("([a-z]+)([0-9]+)([a-z]+)", "aaa123ccc", 1, "%"));
// replace with "!!!" what was matched the 4th time by the group 2
// input: a1b2c3d4e5
// outp...
Using Java to find substring of a bigger string using Regular Expression
..._]*\s*\[([^\]]*)\]
This will validate things like Foo [Bar], or myDevice_123["input"] for instance.
Main issue
The main problem is when you want to extract the content of something like this:
FOO[BAR[CAT[123]]+DOG[FOO]]
The Regex won't work and will return BAR[CAT[123 and FOO.
If we change th...
Abandoning changes without deleting from history
...r you is to mark the old branch as "closed". If your old head is revision "123" then:
hg update -r 123
hg commit --close-branch -m 'Closing old branch'
hg update -C default
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Start a git commit message with a hashmark (#)
...
As you are able to have a commit message of "#123 Commit message" as well as comments in clients such as GitHub for Mac and SourceTree I guess is what these clients are doing yes?
– Phil Ostler
Feb 12 '14 at 11:47
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What is a 'semantic predicate' in ANTLR?
...) throws Exception {
ANTLRStringStream in = new ANTLRStringStream("123, 456, 7 , 89");
NumbersLexer lexer = new NumbersLexer(in);
CommonTokenStream tokens = new CommonTokenStream(lexer);
NumbersParser parser = new NumbersParser(tokens);
parser.parse();
}...