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What does the underscore library do in JavaScript?
Underscore is a JavaScript library that provides a whole mess of useful functional programming helpers without extending any built-in objects.
How to iterate over a list of elements in underscore?
Underscore 2.x will likely remove support for some outdated environments. Iterates over a list of elements, yielding each in turn to an iteratee function. The iteratee is bound to the context object, if one is passed. Each invocation of iteratee is called with three arguments: (element, index, list).
How to calculate max value in Underscore.js?
max _.max (list, [iteratee], [context]) Returns the maximum value in list. If an iteratee function is provided, it will be used on each value to generate the criterion by which the value is ranked. -Infinity is returned if list is empty, so an isEmpty guard may be required.
Which is the first name of a module in underscore?
For functions with multiple aliases, the file name of the module is always the first name that appears in the documentation. For example, _.reduce / _.inject / _.foldl is exported from underscore/modules/reduce.js. Modular usage is mostly recommended for creating a customized build of Underscore.
Which is JavaScript engine does underscore 1.X support?
Modular usage is mostly recommended for creating a customized build of Underscore. Underscore 1.x is backwards compatible with any engine that fully supports ES3, while also utilizing newer features when available, such as Object.keys, typed arrays and ES modules. We routinely run our unittests against the JavaScript engines listed below:
Which is the most popular JavaScript utility library?
Lodash, NPM’s most downloaded and most dependent-upon package, was built to provide more consistent cross-environment iteration support for arrays, strings, objects, and arguments objects. It has since became a superset of Underscore, and both are maintained by the same core contributors. Should definitely be in your stack.