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Returns the index of the first element in the provided collection that satisfies the provided testing function, -1 otherwise.
Implement an appropriate function for each type.
Use range to iterate over elements in the given collection, using f to determine if the element matches.
Return the index of the first matching element or -1 if none is found.
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Returns the sum value of a list of numbers.
Use Iterable.reduce() to sum all the numbers in a list.
Returns all the elements of an array except the last one.
Use arr.slice(0,-1) to return all but the last element of the array.
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Returns every nth element in a list.
Use [nth-1::nth] to create a new list that contains every nth element of the given list.
Truncates a string up to a specified length.
Determine if the string’s length is greater than num.
Return the string truncated to the desired length, with '...' appended to the end or the original string.
Clamps n within the inclusive range specified by the boundary values a and b.
If n falls within the range, return n.
Otherwise, return the nearest number in the range.
Returns the first defined, non-null argument.
Use Array.prototype.find() and Array.prototype.includes() to find the first value that is not equal to undefined or null.
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Calculates the factorial of an integer.
Use recursion.
If n is less than or equal to 1, return 1.
Otherwise, return the product of n and the factorial of n-1.
Throws an exception if n is a negative number.
Returns the native type of a value.
Return 'undefined' or 'null' if the value is undefined or null.
Otherwise, use Object.prototype.constructor.name to get the name of the constructor.
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If the text is longer than one line, it will be truncated and end with an ellipsis ….
overflow: hidden prevents the text from overflowing its dimensions (for a block, 100% width and auto height).white-space: nowrap prevents the text from exceeding one line in height.text-overflow: ellipsis makes it so that if the text exceeds its dimensions, it will end with an ellipsis.width: 200px; ensures the element has a dimension, to know when to get ellipsis