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How to check if an object is a list or tuple (but not string)?
This is what I normally do in order to ascertain that the input is a list / tuple - but not a str . Because many times I stumbled upon bugs where a function passes a str object by mistake, and the target function does for x in lst assuming that lst is actually a list or tuple .
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When should we call System.exit in Java
In Java, What is the difference with or without System.exit(0) in following code?
10 Answers
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How do I pass a method as a parameter in Python
...em around the way you do variables. In fact, you can think about a method (or function) as a variable whose value is the actual callable code object.
Since you asked about methods, I'm using methods in the following examples, but note that everything below applies identically to functions (except wi...
How to use double or single brackets, parentheses, curly braces
...eses, curly braces in Bash, as well as the difference between their double or single forms. Is there a clear explanation?
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How can I quantify difference between two images?
... and calculate an element-wise (pixel-by-pixel) difference. Calculate the norm of the difference.
Option 2: Load both images. Calculate some feature vector for each of them (like a histogram). Calculate distance between feature vectors rather than images.
However, there are some decisions to make ...
When is a Java method name too long? [closed]
In the last weeks I've seen some guys using really long names for a Method or Class (50 characters), this is usually under the premise that it improves readability, my opinion is that a long name like this is an indicator that we are trying to do a lot or too much in a method class if we need such a...
For-each over an array in JavaScript
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TL;DR
Don't use for-in unless you use it with safeguards or are at least aware of why it might bite you.
Your best bets are usually
a for-of loop (ES2015+ only),
Array#forEach (spec | MDN) (or its relatives some and such) (ES5+ only),
a sim...
What is monkey patching?
I am trying to understand, what is monkey patching or a monkey patch?
8 Answers
8
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What does the servlet value signify
...are having a few servlets defined. Here is the excerpt from the web.xml for one of the servlets:
11 Answers
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What does “|=” mean? (pipe equal operator)
...ification.defaults | Notification.DEFAULT_SOUND;
where | is the bit-wise OR operator.
All operators are referenced here.
A bit-wise operator is used because, as is frequent, those constants enable an int to carry flags.
If you look at those constants, you'll see that they're in powers of two :
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