underscore.js Back
According to the official statement, Underscore is a JavaScript library that provides a whole mess of useful functional programming helpers without extending any built-in objects.
Here I will note what other people grasp from this library according to summaries of hanzichi's underscore-analysis.
- Use
void 0rather thanundefined - Common type inference and some useful tutorials
- Compatibility problems of
for ... in - The internal function:
createAssigner() - How to compare the equality of two elements
- Certain object functions like
pick()andcreate() - How to find items in an array
- How to get an array unique
- Flatten an array
- Certain array functions like
compact(),difference(), andwithout() - NaN?
- Array-like Objects
- How to shuffle an array
- Group
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