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How can I declare optional function parameters in Javascript? [duplicate]
...ES5:
function myFunc(a,b) {
b = b || 0;
// b will be set either to b or to 0.
}
This works as long as all values you explicitly pass in are truthy.
Values that are not truthy as per MiniGod's comment: null, undefined, 0, false, ''
It's pretty common to see JavaScript libraries to do a bunch...
range() for floats
Is there a range() equivalent for floats in Python?
21 Answers
21
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How to change a module variable from another module?
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You are using from bar import a. a becomes a symbol in the global scope of the importing module (or whatever scope the import statement occurs in).
When you assign a new value to a, you are just changing which value a points too, not the actual valu...
python: How do I know what type of exception occurred?
...explanation. Basically, it's so that you don't hide:
the fact that an error occurred
the specifics of the error that occurred (error hiding antipattern)
So as long as you take care to do none of those things, it's OK to catch the generic exception. For instance, you could provide information ab...
Different types of thread-safe Sets in Java
...readers and writers (though writing itself needs to be synchronized). The normally fast set operations (especially contains()) are quite slow here, as the arrays will be searched in linear time.
Use this only for really small sets which will be read (iterated) often and changed seldom. (Swings list...
jQuery.active function
I was trying to find some more information on the following jQuery function:
2 Answers
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Utils to read resource text file to String (Java) [closed]
...
Yes, Guava provides this in the Resources class. For example:
URL url = Resources.getResource("foo.txt");
String text = Resources.toString(url, StandardCharsets.UTF_8);
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How do I represent a hextile/hex grid in memory?
...ionships Between Parts section of my grids article at www-cs-students.stanford.edu/~amitp/game-programming/grids (the diagrams are for square grids but the table includes the formulas for axial hex grids also)
– amitp
Jun 7 '13 at 0:58
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How to apply shell command to each line of a command output?
...is read properly. From the man page of xargs:
-L number
Call utility for every number non-empty lines read.
A line ending with a space continues to the next non-empty line. [...]
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Making a div vertically scrollable using CSS
...ty. The scrollbar can be triggered with any property overflow, overflow-x, or overflow-y and each can be set to any of visible, hidden, scroll, auto, or inherit. You are currently looking at these two:
auto - This value will look at the width and height of the box. If they are defined, it won't le...