30秒学会 JavaScript 片段 – elementContains
Returns true if the parent element contains the child element, false otherwise. Check that parent is...
Returns true if the parent element contains the child element, false otherwise. Check that parent is...
Returns the symmetric difference between two arrays, after applying the provided function to each ar...
Splits values into two groups. If an element in filter is True, the corresponding element in the col...
Returns the nth term of the Fibonacci sequence. Use recursion to calculate the nth term in the Fibon...
Returns the distance between two vectors. Use Array.prototype.reduce(), Math.pow() and Math.sqrt() t...
Returns a map with the unique values of the collection as keys and their frequencies as the values. ...
Returns a random double in the specified range. Use Random.nextDouble() to generate a random number ...
Mutates an array by removing elements for which the given function returns false. Use Array.prototyp...
Creates a function that invokes fn with partials prepended to the arguments it receives. Use the spr...
Returns the first string there is between the strings from the parameter $start and $end. Use trim()...