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Returns the angle (theta) between two vectors.
Use Array.prototype.reduce(), Math.pow() and Math.sqrt() to calculate the magnitude of each vector and the scalar product of the two vectors.
Use Math.acos() to calculate the arccos and get the theta value.
继续阅读 30秒学会 JavaScript 片段 – vectorAngle
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Maps a number from one range to another range.
Returns n mapped between outMin–outMax from inMin–inMax.
继续阅读 30秒学会 Dart 片段 – mapNumRange
Calculates the Hamming distance between two values.
Use the XOR operator (^) to find the bit difference between the two numbersand convert to a binary string using fmt.Sprintf() with "%b.
Count and return the number of 1s in the string, using strings.Count().
继续阅读 30秒学会 Golang 片段 – HammingDistance
Initializes an array containing the numbers in the specified range (in reverse) where start and end are inclusive with their common difference step.
Use Array.from(Math.ceil((end+1-start)/step)) to create an array of the desired length(the amounts of elements is equal to (end-start)/step or (end+1-start)/step for inclusive end), Array.prototype.map() to fill with the desired values in a range.
You can omit start to use a default value of 0.
You can omit step to use a default value of 1.
继续阅读 30秒学会 JavaScript 片段 – initializeArrayWithRangeRight
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Initializes an array containing the numbers in the specified range where start and end are inclusive and the ratio between two terms is step.
Returns an error if step equals 1.
Use Array.from(), Math.log() and Math.floor() to create an array of the desired length, Array.prototype.map() to fill with the desired values in a range.
Omit the second argument, start, to use a default value of 1.
Omit the third argument, step, to use a default value of 2.
继续阅读 30秒学会 JavaScript 片段 – geometricProgression
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Converts an angle from radians to degrees.
Use Math.PI and the radian to degree formula to convert the angle from radians to degrees.
继续阅读 30秒学会 JavaScript 片段 – radsToDegrees
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Clamps $num within the inclusive range specified by the boundary values $a and $b.
If $num falls within the range, return $num.
Otherwise, return the nearest number in the range, using min() and max().
继续阅读 30秒学会 PHP 片段 – clampNumber
Returns the maximum of a collection, after mapping each element to a value using the provided function.
Use IEnumerable.Select() to map each element to the value returned by the provided selector function, fn.
Use IEnumerable.Max() to get the maximum of the resulting values.
Returns the sum of two or more numbers.
Use range to iterate over the values of nums, adding each value to sum.
Returns the n maximum elements from the provided array.
If n is greater than or equal to the provided array’s length, then return the original array (sorted in descending order).
Use Array.prototype.sort() combined with the spread operator (...) to create a shallow clone of the array and sort it in descending order.
Use Array.prototype.slice() to get the specified number of elements.
Omit the second argument, n, to get a one-element array.
继续阅读 30秒学会 JavaScript 片段 – maxN
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