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Calculate distance between two latitude-longitude points? (Haversine formula)
...it's pretty much the same as the values obtained from Apple's Map app :-)
Extra update:
If you are using iOS4 or later then Apple provide some methods to do this so the same functionality would be achieved with:
-(double)kilometresBetweenPlace1:(CLLocationCoordinate2D) place1 andPlace2:(CLLocatio...
What is the “__v” field in Mongoose
...n_key, you can just:
var UserSchema = new mongoose.Schema({
nickname: String,
reg_time: {type: Date, default: Date.now}
}, {
versionKey: false // You should be aware of the outcome after set to false
});
Setting the versionKey to false means the document is no longer versioned.
This...
Spring AOP vs AspectJ
... if your aspects are weaved to only what you wanted to be weaved.
You need extra build process with AspectJ Compiler or have to setup LTW (load-time weaving)
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Is JavaScript a pass-by-reference or pass-by-value language?
The primitive types (number, string, etc.) are passed by value, but objects are unknown, because they can be both passed-by-value (in case we consider that a variable holding an object is in fact a reference to the object) and passed-by-reference (when we consider that the variable to the object hol...
How to call a SOAP web service on Android [closed]
...ice.
Now take an input stream on the same
HTTP connection and receive the
string object. This string object is
a SOAP response.
If the response code is other than
200 then take a ErrorInput stream on
same HTTPobject and receive the
error if any.
Parse the received response
using SAXParser (in my c...
How to use auto-layout to move other views when a view is hidden?
...
It is possible, but you'll have to do a little extra work. There are a couple conceptual things to get out of the way first:
Hidden views, even though they don't draw, still participate in Auto Layout and usually retain their frames, leaving other related views in their...
Mipmap drawables for icons
... Note that if the renderer respects this hint it might have to
* allocate extra memory to hold the mipmap levels for this bitmap.
*
* This property is only a suggestion that can be ignored by the
* renderer. It is not guaranteed to have any effect.
*
* @param hasMipMap indicates whether the re...
Why is Magento so slow? [closed]
...ture, but it means anytime a model, helper, or controller is instantiated, extra PHP instructions need to run to determine if an original class file or an override class files is needed. This adds up.
Besides the layout system, Magento's template system involves a lot of recursive rendering. This ...
Secure random token in Node.js
...e('crypto').randomBytes(48, function(err, buffer) {
var token = buffer.toString('hex');
});
The 'hex' encoding works in node v0.6.x or newer.
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How do I install from a local cache with pip?
...
pip wheel is an excellent option that does what you want with the extra feature of pre-compiling the packages. From the official docs:
Build wheels for a requirement (and all its dependencies):
$ pip wheel --wheel-dir=/tmp/wheelhouse SomePackage
Now your /tmp/wheelhouse directory...