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How to check if function exists in JavaScript?
...typeof me.onChange !== "undefined") {
// safe to use the function
}
or better yet (as per UpTheCreek upvoted comment)
if (typeof me.onChange === "function") {
// safe to use the function
}
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What is the equivalent of the C# 'var' keyword in Java?
One use of the var keyword in C# is implicit type declaration. What is the Java equivalent syntax for var ?
15 Answers
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When to use PNG or JPG in iPhone development?
...CPU energy to display. However, large PNGs may take longer to read from storage than more compressed image formats, and thus be slower to display.
JPG's are smaller to store, but lossy (amount depends on compression level), and to display them requires a much more complicated decoding algorithm. ...
Get exit code of a background process
I have a command CMD called from my main bourne shell script that takes forever.
12 Answers
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What is the proper way to re-throw an exception in C#? [duplicate]
I have a question for you that stems from my partner doing things a different way than I do.
9 Answers
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Is using a lot of static methods a bad thing?
...a class when that class doesn't require to keep track of internal states. For example, if I need to transform A into B and don't rely on some internal state C that may vary, I create a static transform. If there is an internal state C that I want to be able to adjust, then I add a constructor to set...
What are the pros and cons of performing calculations in sql vs. in your application
...
It depends on a lot of factors - but most crucially:
complexity of calculations (prefer doing complex crunching on an app-server, since that scales out; rather than a db server, which scales up)
volume of data (if you need to access/aggregate a lot o...
What is the difference between gravity and layout_gravity in Android?
...e View it's used on.
android:layout_gravity sets the gravity of the View or Layout relative to its parent.
And an example is here.
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Does Python have a string 'contains' substring method?
I'm looking for a string.contains or string.indexof method in Python.
10 Answers
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Adding a cross-reference to a subheading or anchor in another page
...w to insert a cross-reference in a reST/Sphinx page to either a sub-header or anchor in another page in the same documentation set?
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