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Get User's Current Location / Coordinates
How can I store the user's current location and also show the location on a map?
15 Answers
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How do I clear the std::queue efficiently?
I am using std::queue for implementing JobQueue class. ( Basically this class process each job in FIFO manner).
In one scenario, I want to clear the queue in one shot( delete all jobs from the queue).
I don't see any clear method available in std::queue class.
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Solutions for distributing HTML5 applications as desktop applications? [closed]
What are some solutions for distributing an HTML5 based desktop application?
16 Answers
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Changing the image source using jQuery
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You can use jQuery's attr() function. For example, if your img tag has an id attribute of 'my_image', you would do this:
<img id="my_image" src="first.jpg"/>
Then you can change the src of your image with jQuery like this:
$("#my_image").attr("src","seco...
How to create a file in memory for user to download, but not through server?
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You can use data URIs. Browser support varies; see Wikipedia. Example:
<a href="data:application/octet-stream;charset=utf-16le;base64,//5mAG8AbwAgAGIAYQByAAoA">text file</a>
The octet-stream is to force a download prompt. Otherwise, it will pr...
Most efficient way to cast List to List
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The syntax for this sort of assignment uses a wildcard:
List<SubClass> subs = ...;
List<? extends BaseClass> bases = subs;
It's important to realize that a List<SubClass> is not interchangeable with a List<BaseCla...
Maximum size of a element
I'm working with a canvas element with a height of 600 to 1000 pixels and a width of several tens or hundreds of thousands of pixels. However, after a certain number of pixels (obviously unknown), the canvas no longer display shapes I draw with JS.
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Android check internet connection [duplicate]
...onnected to internet and returns true if connected:
private boolean isNetworkConnected() {
ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
return cm.getActiveNetworkInfo() != null && cm.getActiveNetworkInfo().isConnected();
}
in mani...
Apply pandas function to column to create multiple new columns?
...840
4 0.088212 1.088212 -0.911788
EDIT:
Please be aware of the huge memory consumption and low speed: https://ys-l.github.io/posts/2015/08/28/how-not-to-use-pandas-apply/ !
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PHP - Extracting a property from an array of objects
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If you have PHP 5.5 or later, the best way is to use the built in function array_column():
$idCats = array_column($cats, 'id');
But the son has to be an array or converted to an array
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