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When should I use a composite index?
...in the original post. My query is to return homes within a square grid. I know about spatial and I'm not trying to calculate distances. I simply want to know if using a composite index make sense when I'm trying to display all homes within a particular geo grid (e.g. neighborhood/city/county)
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Scala: Abstract types vs generics
...s.
You say, my new Animal class has a type of SuitableFood, which I don't know.
So it's an abstract type. You don't give an implementation of the type. Then you have an eat method that eats only SuitableFood.
And then in the Cow class I would say, OK, I have a Cow, which extends class Animal, and fo...
How can I use UIColorFromRGB in Swift?
...0FF) / 255.0,
alpha: CGFloat(1.0)
)
}
}
This can now be used like so:
view.backgroundColor = UIColor(rgb: 0x209624)
I would only recommend monkey patching UIKit classes like this in your own client code, not libraries.
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What does string::npos mean in this code?
...ution
is to define your own signed value for npos:
const int NPOS = -1;
Now the comparison looks a bit different and even more convenient:
if (idx == NPOS) { // works almost always
...
}
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How to substring in jquery
...he substr function will allow you to extract certain parts of the string.
Now, if you're looking for a specific string or character to use to find what part of the string to extract, you can make use of the indexOf function as well.
http://www.w3schools.com/jsref/jsref_IndexOf.asp
The question is ...
Create empty file using python [duplicate]
...ronment with Jython/IronPython? Well too bad you didn't close those files, now your program is leaking like a sieve ;) It's especially awful since 2.5, as with makes it easier to close the file timely (and even in the face of exceptions and circular references) and the code becomes clearer to boot.
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深入理解 x86/x64 的中断体系 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...T_SEG
;----------------------------------------------------------
; Now, the processor is real mode
;----------------------------------------------------------
bits 16
org BOOT_SEG ; for int 19
start:
mov ax, cs
mov ds,...
ActiveModel::ForbiddenAttributesError when creating new user
...pecify in
each controller)
Additionally, load_and_authorize_resource can now take a param_method option to specify a custom method in the controller to run to sanitize input.
You can associate the param_method option with a symbol corresponding to the name of a method that will get called:
class...
How to write an inline IF statement in JavaScript?
...e minor if the value is true, and major if the value is false.
This is known as a Conditional (ternary) Operator.
https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Operators/Conditional_Operator
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How to pass parameters in GET requests with jQuery
...low.com/questions/41192531/…. I progressed on this Q much further, where now I call a jquery dialog and call ajax to retrieve data from mysql. I am missing the link on how to retrieve the unique ID associated with each datapoint click. Appreciate if you can help me out. Thank you
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