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Individual Exercises

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Given `start` and `end` integers, return a new array containing the sequence of integers from `start` up to but not including `end`, so `start` = 5...

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Return an array that is "left shifted" by one--so for an input of {6, 2, 5, 3}, the method returns {2, 5, 3, 6}. You may modify and...

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Given a non-empty array of `int`s, return a new array containing the elements from the original array that come after the last 4 in the...

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We'll say that an element in an array is "alone" if there are values before and after it, and those values are different from it. Return...

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Return an array that contains the exact same numbers as the given array, but rearranged so that all the zeros are grouped at the start of...

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Given two arrays of `int`s sorted in increasing order, called `outer` and `inner`, return `true` if all of the numbers in `inner` also appear in `...`

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Given `n` >= 0, create an array of length `n * n` with the following pattern, shown here for `n` = 3 : {0, 0, 1, 0, 2, 1, 3, 2, 1} (spaces...

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Given two strings, `word` and a separator `sep`, return a big string made of `count` occurrences of the `word`, separated by the separator...

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Write a method called `listUpper()` that takes in a list of strings, and returns a list of the same length containing the same strings but...

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Write a method called `listSearch()` that takes in a target string and a list of other strings. This method returns a (possibly shorter)...

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Write a method called `listLength()` that takes in a list of strings and returns a list of their lengths as integers. You must create a new...

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Given a string, return a string where for every char in the original, there are two chars.

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Given a string, compute a new string by moving the first char to come after the next two chars, so "abc" yields "bca". Repeat this...

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Returns true if for every '*' (star) in the string, if there are chars both immediately before and after the star, they are the same.

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Given two strings, `base` and `remove`, return a version of the `base` string where all instances of the `remove` string have been removed (not...

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Given a string, return true if the number of appearances of "is" anywhere in the string is equal to the number of appearances of "not"...

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We'll say that a "triple" in a string is a char appearing three times in a row. Return the number of triples in the given string. The...

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We'll say that a lowercase 'g' in a string is "happy" if there is another 'g' immediately to its left or right. Return true if all the...

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Given a string, return the length of the largest "block" in the string. A block is a run of adjacent chars that are the same.

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Given a string, look for a mirror image (backwards) string at both the beginning and end of the given string. In other words, zero or...

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Given a string, return the sum of the numbers appearing in the string, ignoring all other characters. A number is a series of 1 or more...

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Given a string, return a string where every appearance of the lowercase word "is" has been replaced with "is not". The word "is" should...