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Leaflet - How to find existing markers, and delete markers?

...ve to put your "var marker" out of the function. Then later you can access it : var marker; function onMapClick(e) { marker = new L.Marker(e.latlng, {draggable:true}); map.addLayer(marker); marker.bindPopup("<b>Hello world!</b><br />I am a popup.").openPopu...
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PHP check whether property exists in object or class

...follow | edited Mar 15 at 15:51 Abel Callejo 9,05577 gold badges4444 silver badges6262 bronze badges ...
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C++ map access discards qualifiers (const)

... std::map's operator [] is not declared as const, and cannot be due to its behavior: T& operator[] (const Key& key) Returns a reference to the value that is mapped to a key equivalent to key, performing insertion if such key does not already exist. As a result, your function ...
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What is a proper naming convention for MySQL FKs?

...id FOREIGN KEY (user_id) REFERENCES users(user_id); I try to stick with the same field names in referencing and referenced tables, as in user_id in the above example. When this is not practical, I also append the referenced field name to the foreign key name. This naming convention allows m...
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Is there a Python equivalent of the C# null-coalescing operator?

In C# there's a null-coalescing operator (written as ?? ) that allows for easy (short) null checking during assignment: ...
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How do I print a list of “Build Settings” in Xcode project?

... UPDATE: This list is getting a little out dated (it was generated with Xcode 4.1). You should run the command suggested by dunedin15. dunedin15's answer can give inaccurate results for some edge-cases, such as when debugging build settings of a static lib f...
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Is there a way to pass optional parameters to a function?

...re a way in Python to pass optional parameters to a function while calling it and in the function definition have some code based on "only if the optional parameter is passed" ...
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How to smooth a curve in the right way?

... I prefer a Savitzky-Golay filter. It uses least squares to regress a small window of your data onto a polynomial, then uses the polynomial to estimate the point in the center of the window. Finally the window is shifted forward by one data...
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Is there Selected Tab Changed Event in the standard WPF Tab Control

... I tied this in the handler to make it work: void TabControl_SelectionChanged(object sender, SelectionChangedEventArgs e) { if (e.Source is TabControl) { //do work when tab is changed } } ...
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Injecting a mock into an AngularJS service

I have an AngularJS service written and I would like to unit test it. 7 Answers 7 ...