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# Exercise Title Features Description Platform Keywords
1 Given a two-dimensional array of integers, return the average of the four corner elements. Code Completion Given a two-dimensional array of integers, return the average of the four corner elements. CodeCheck Two-Dimensional Arrays, No Loops
2 Given a two-dimensional array of integers, return the middle element if both the row and column lenghts are odd, or the average of the two or four middle elements of one or both is even. Code Completion Given a two-dimensional array of integers, return the middle element if both the row and column lenghts are odd, or... CodeCheck Two-Dimensional Arrays, No Loops
3 Given a two-dimensional array of integers and a string N, E, S, W, give the middle element along the border in the given compass direction, or the average of the two middle ones if the border length is even. Code Completion Given a two-dimensional array of integers and a string N, E, S, W, give the middle element along the border... CodeCheck Two-Dimensional Arrays, No Loops
4 Given a two-dimensional array of integers and a string NW, NW, SW, SE, return the sum of the four elements in the given compass direction. Code Completion Given a two-dimensional array of integers and a string NW, NW, SW, SE, return the sum of the four elements... CodeCheck Two-Dimensional Arrays, No Loops
5 Given a two-dimensional array of integers, row/column indexes r, c, and a string N E S W, return the neighbor in that direction, or 0 if it doesn't exist. Code Completion Given a two-dimensional array of integers, row/column indexes r, c, and a string N E S W, return the neighbor... CodeCheck Two-Dimensional Arrays, No Loops
6 Repeat with NW NE SW SE. Code Completion Repeat with NW NE SW SE. CodeCheck Two-Dimensional Arrays, No Loops
7 Given a two-dimensional array of integers and row/column indexes r, c, return the number of neighbors (not counting the element itself). Code Completion Given a two-dimensional array of integers and row/column indexes r, c, return the number of neighbors (not counting the element... CodeCheck Two-Dimensional Arrays, No Loops
8 On a chessboard, positions are marked with a letter between a and h for the column and a number between 1 and 8 for the row. Code Completion On a chessboard, positions are marked with a letter between a and h for the column and a number between... CodeCheck Two-Dimensional Arrays, No Loops
9 Given a list of integers of length ≥ 4, return the average of the first two and last two elements. Code Completion Given a list of integers of length ≥ 4, return the average of the first two and last two elements. CodeCheck Lists - Simple Exercises, No loops
10 Given a list of integers of length ≥ 3, return the average of the first, last, and middle element (or the two middle elements if the length is even). Code Completion Given a list of integers of length ≥ 3, return the average of the first, last, and middle element (or... CodeCheck Lists - Simple Exercises, No loops
11 Given a list of integers, swap the first and last elements. Code Completion Given a list of integers, swap the first and last elements. CodeCheck Lists - Simple Exercises, No loops
12 Given a list of integers, swap the first two and the last two elements. Code Completion Given a list of integers, swap the first two and the last two elements. CodeCheck Lists - Simple Exercises, No loops
13 Given a string, return the string with the first and last characters swapped. Code Completion Given a string, return the string with the first and last characters swapped. CodeCheck Strings, No Loops
14 Given a string, return the string with the middle two characters removed if it has even length, and the middle character removed if it has odd length. Code Completion Given a string, return the string with the middle two characters removed if it has even length, and the middle... CodeCheck Strings, No Loops
15 Given a string, return the string with the middle two characters swapped if it has even length, and the middle three characters swapped if it has odd length. Code Completion Given a string, return the string with the middle two characters swapped if it has even length, and the middle... CodeCheck Strings, No Loops
16 Given a string, return the string with the first and second half swapped. Code Completion Given a string, return the string with the first and second half swapped. If the string has odd length, leave... CodeCheck Strings, No Loops
17 Given a string, return the string with the first half and the second half doubled. Code Completion Given a string, return the string with the first half and the second half doubled. For example, Java becomes JaJavava... CodeCheck Strings, No Loops
18 Given a string, return the string with the first and last characters swapped. Code Completion Given a string, return the string with the first and last characters swapped. CodeCheck Strings, No Loops
19 Given a string, return the string with the middle two characters swapped if it has even length, and the middle three characters swapped if it has odd length. Code Completion Given a string, return the string with the middle two characters swapped if it has even length, and the middle... CodeCheck Strings, No Loops
20 Given a string, return the string with the first and second half swapped. Code Completion Given a string, return the string with the first and second half swapped. If the string has odd length, leave... CodeCheck Strings, No Loops
21 Given a string, return the string with the first half and the second half doubled. Code Completion Given a string, return the string with the first half and the second half doubled. For example, Java becomes JaJavava... CodeCheck Strings, No Loops
22 Given a string, return the string with the middle two characters removed if it has even length, and the middle character removed if it has odd length. Code Completion Given a string, return the string with the middle two characters removed if it has even length, and the middle... CodeCheck Strings, No Loops
23 Given an array of integers of length ≥ 4, return the average of the first two and last two elements. Code Completion Given an array of integers of length ≥ 4, return the average of the first two and last two elements. CodeCheck Arrays - Simple Exercises, No loops
24 Given an array of integers, swap the first and last elements. Code Completion Given an array of integers, swap the first and last elements. CodeCheck Arrays - Simple Exercises, No loops
25 Given an array of integers, swap the first two and the last two elements. Code Completion Given an array of integers, swap the first two and the last two elements. CodeCheck Arrays - Simple Exercises, No loops
26 Given an array of integers of length ≥ 3, return the average of the first, last, and middle element (or the two middle elements if the length is even). Code Completion Given an array of integers of length ≥ 3, return the average of the first, last, and middle element (or... CodeCheck Arrays - Simple Exercises, No loops
27 Given a two-dimensional array of integers, return the average of the four corner elements. Code Completion Given a two-dimensional array of integers, return the average of the four corner elements. CodeCheck Two-Dimensional Arrays, No Loops
28 Given a two-dimensional array of integers and a string N, E, S, W, give the middle element along the border in the given compass direction, or the average of the two middle ones if the border length is even. Code Completion Given a two-dimensional array of integers and a string N, E, S, W, give the middle element along the border... CodeCheck Two-Dimensional Arrays, No Loops
29 Given a two-dimensional array of integers and a string NW, NW, SW, SE, return the sum of the four elements in the given compass direction. Code Completion Given a two-dimensional array of integers and a string NW, NW, SW, SE, return the sum of the four elements... CodeCheck Two-Dimensional Arrays, No Loops
30 Given a two-dimensional array of integers, row/column indexes r, c, and a string N E S W, return the neighbor in that direction, or 0 if it doesn't exist. Code Completion Given a two-dimensional array of integers, row/column indexes r, c, and a string N E S W, return the neighbor... CodeCheck Two-Dimensional Arrays, No Loops
31 Repeat with NW NE SW SE. Code Completion Repeat with NW NE SW SE. CodeCheck Two-Dimensional Arrays, No Loops
32 Given a two-dimensional array of integers, return the middle element if both the row and column lenghts are odd, or the average of the two or four middle elements of one or both is even. Code Completion Given a two-dimensional array of integers, return the middle element if both the row and column lenghts are odd, or... CodeCheck Two-Dimensional Arrays, No Loops
33 On a chessboard, positions are marked with a letter between a and h for the column and a number between 1 and 8 for the row. Code Completion On a chessboard, positions are marked with a letter between a and h for the column and a number between... CodeCheck Two-Dimensional Arrays, No Loops
34 Given a two-dimensional array of integers and row/column indexes r, c, return the number of neighbors (not counting the element itself). Code Completion Given a two-dimensional array of integers and row/column indexes r, c, return the number of neighbors (not counting the element... CodeCheck Two-Dimensional Arrays, No Loops
35 Calcular una potencia Construye una funcion que calcule la potencia de un numero. La funcion recibe dos enteros como parametros (la base y... jsParsons loops, while loop
36 Calcular una potencia Construye una funcion que tome una base y un exponente no negativo como parametros y calcule la base elevada al... jsParsons for loop, loops
37 Calcular una potencia Construye un programa que calcule la base elevada al exponente no negativo sin usar multiplicacion. jsParsons for loop, loops
38 Given a two-dimensional array of integers, return the position of the largest square subarray filled with zeroes, as a list of length 2. Code Completion Given a two-dimensional array of integers, return the position of the largest square subarray filled with zeroes, as a list... CodeCheck Two-Dimensional Arrays, Complex Loops
39 Given a two-dimensional array of integers, return the position of the largest square subarray filled with zeroes, as an array of length 2. Code Completion Given a two-dimensional array of integers, return the position of the largest square subarray filled with zeroes, as an array... CodeCheck Two-Dimensional Arrays, Complex Loops