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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...
...己实盘交易为例，6月20日，20万左右的账户，豆粕1301/1305跨期套利，16趟来回，扣除手续费后，净利润170多元，6月19日，同样是豆粕1301/1305,52趟来回，净利润560多元。
具体来说，实现“高频”，首先需要市场提供交易机会，其...
Make an existing Git branch track a remote branch?
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isapir
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answered Feb 18 '10 at 3:06
Dan MouldingDan Moul...
How do I check in JavaScript if a value exists at a certain array index?
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answered Apr 20 '10 at 3:51
thomasrutterthomasrutter
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How to make a edittext box in a dialog
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answered Sep 14 '13 at 6:58
RaghunandanRaghunandan
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Programmatically create a UIView with color gradient
...ive-C:
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 50)];
CAGradientLayer *gradient = [CAGradientLayer layer];
gradient.frame = view.bounds;
gradient.colors = @[(id)[UIColor whiteColor].CGColor, (id)[UIColor blackColor].CGColor];
[view.layer insertSublayer:gradient atIndex:0...
Is the ternary operator faster than an “if” condition in Java [duplicate]
...y is not at all always more readable. Consider maxSpeed = isParkingLot() ? 5 : ( isInnerCity() ? 50 : 100); vs. a chain of ifs or a switch statement. Also when the expressions get long (maxSpeed = map.getStreetType(car.getLocation()) == MapType.PARKING_LOT ? TrafficRules.getMaxSpeed(MapType.PARKING_...
How to select the first element with a specific attribute using XPath
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edited Jan 26 at 5:43
the Tin Man
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Python nonlocal statement
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495
Compare this, without using nonlocal:
x = 0
def outer():
x = 1
def inner():
x =...
How to automatically crop and center an image
...-ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=0)";
/* IE 5-7 */
filter: alpha(opacity=0);
/* modern browsers */
opacity: 0;
}
<div class="center-cropped"
style="background-image: url('http://placehold.it/200x200');">
<img src="http://placehold.it/200x2...