Underscore. js. Underscore. Java. Script library that provides a whole mess of useful functional. The iteratee is bound to the context object, if one is. Each invocation of iteratee is called with three arguments. If list is a Java. Script object, iteratee's. Returns the list for chaining. Index Terms—About four key words or phrases in alphabetical order. It was my 3rd Anniversary and I had to try and 3D print some roses for my wife. I found this great model from Thingkinlink, which needed some cleaning. But it works by duck- typing, so avoid passing objects with. It's also good to note that an. The iteratee. is passed three arguments: the value, then the index. Summary: Learn how to automate the creation and formatting of tables in Word. Get information about optimizing performance, populating a table with data, formatting. 1 Introduction 1.1 Background. This section is non-normative. The World Wide Web's markup language has always been HTML. HTML was primarily designed as a language for. The iteratee is passed four arguments: the memo, then the value and. The first element is instead passed as the memo in the invocation of the iteratee on the next. Foldr. is not as useful in Java. Script as it would be in a language with lazy. The function returns as. Print Campbell Biology: Chapter 17 Test Preparation flashcards and study them anytime, anywhere. The opposite of filter. Short- circuits and stops traversing the list. Short- circuits and stops traversing the list. If an iteratee. function is provided, it will be used on each value to generate the. Non- numerical values in list will be ignored. If an iteratee. function is provided, it will be used on each value to generate the. Infinity is returned. Empty guard. may be required. Non- numerical values in list will be ignored. If iteratee is a string instead of. Pass a number to. Otherwise a single random. Passing n will. return the first n elements of the array. Especially useful on. Pass n to exclude the last n elements. Passing n will return. Pass an index. to return the values of the array from that index onward. If you. pass shallow, the array will only be flattened a single level. In particular only the first occurence of each value is kept. Useful when you have separate. Given an array of arrays, returns a. Pass either a single list of. If you're working with a. Sorted to use a faster binary search .. Pass from. Index to start your search at a. If an iteratee function is provided, it will be used to compute. Returns a list of integers. Note that ranges that stop before they start. For partial application without. Very handy for binding functions that are going to be used. A close cousin. of bind. Useful. for speeding up slow- running computations. If passed an optional. Function, it will be used to compute the hash key for storing. The default. hash. Function just uses the first argument to the memoized function. The cache of memoized values is available as the cache. If you pass the optional arguments, they will be. Useful for performing. HTML rendering in chunks without blocking the UI thread. If you pass the optional arguments, they will be. Useful for rate- limiting events that occur faster than you. Useful for implementing behavior that should only happen. For example: rendering a. Markdown comment, recalculating a layout after the window. Useful in circumstances like. Useful for initialization functions. Useful for grouping asynchronous responses. The result of the last function call is memoized and. This allows the wrapper to. In math terms. composing the functions f(), g(), and h() produces. Transform the value. For this to work, all of your object's values. Basically, Object. Identical to. object. Own. Property(key), but uses a safe reference to the. Own. Property function, in case it's been. Takes an object and returns a function. For strings and array- like. Note that Java. Script. Returns. a reference to the Underscore object. In math. f(x) = x. This function looks useless, but is used throughout Underscore as. Each invocation of. Produces an. array of the returned values. Pass. a hash of . Depending upon value's. If prefix is passed, the id will be appended to it. If a default value. If default. Value is a function its result will be returned. Useful for implementing timing/animation. Useful for rendering complicated bits of HTML from JSON. Template functions can both interpolate values, using. If you wish to interpolate a value, and have. HTML- escaped, use < %- . When you evaluate a. The settings argument. You may define or omit any combination of the three. However, you can specify a single variable name. This can significantly improve the speed. This is because precompiled templates can provide line numbers and. The following two lines of code are. When you've finished the computation, call. Here's an example of chaining. Calling methods on this object will continue. Also fixes a bug when passing 0 to is. Array. Like. 2. 2, 2. Diff — Docs. Restores the previous old- Internet- Explorer edge cases changed in. Diff — Docs. Fixes/changes some old- Internet Explorer and related edge case. Test your app with Underscore 1. IE and let. us know how it's doing.. Diff — Docs. Added . Hopefully this will un- break you — if it breaks you. I apologize. A kissing cousin of. It's now known by a more harmonious. Many Underscore methods will take a string argument for easier. Useful in conjunction with other. Underscore collection functions. Also for debounce in a tight loop. It's pretty much always wiser to white- list the names of. The minimum number of calls is (naturally) now 1. They now become no- ops. Use a for loop instead (or better yet, an object). You'll get an early error instead. You may now. also set the variable option when creating a template. Smalltalkers, rejoice. If you'd like to use. Underscore with Require. JS, you can load it as a normal script, wrap. Now JS primitives are. Now it just escapes regardless (#3. Avoiding the use of . Ryan Tenney contributed optimizations to many Underscore. An annotated version of the source code is now available. Technically the correct. Watch out for Na. N comparisons. Improvements since 0. Incorporates a number of. Mile Frawley's refactors for. Native support for ES5's Array. Array. and Object. See. Rick Strahl's blog post. Most other Underscore. Lots of little safety checks. Noah Sloan and. Andri M. If no method names are passed, all of the context. Original patch contributed by. Kirill Ishanov. Added a break. Loop method. to break in the middle of any Underscore iteration. Added an. is. Empty function that works on arrays and objects. Original patch provided by. Marc- Andr. A functions method. Underscore. Aliased it. Iterating over. objects is now called with (value, key, collection), for details.
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