diff --git a/seed/challenges/02-javascript-algorithms-and-data-structures/basic-javascript.json b/seed/challenges/02-javascript-algorithms-and-data-structures/basic-javascript.json index 9a868611b39..b594d83373a 100755 --- a/seed/challenges/02-javascript-algorithms-and-data-structures/basic-javascript.json +++ b/seed/challenges/02-javascript-algorithms-and-data-structures/basic-javascript.json @@ -5585,65 +5585,31 @@ } } }, - { - "id": "587d7b7e367417b2b2512b24", - "title": "Use the Conditional Ternary Operator", - "description": [ - "The conditional/ternary operator is a one line if-else statement.", - "The syntax is", - "condition ? statement-if-true : statement-if-false;", - "For example:", - "function findGreater(a, b) {", - " if(a > b)", - " return \"a is greater\";", - " else", - " return \"b is greater\";", - "}", - "The above function can be written using the conditional like:", - "function findGreater(a, b) {", - " return a > b ? \"a is greater\" : \"b is greater\";", - "}", - "Instructions", - "Using a Conditional Operator, check if two numbers are equal or not." - ], - "challengeSeed": [ - "function checkEqual(a, b) {", - "", - "}", - "checkEqual(1, 2);" - ], - "tail": [], - "solutions": [], - "tests": [ - "assert(checkEqual(1, 2) === false, 'message: checkEqual(1, 2) should return false');", - "assert(checkEqual(1, 1) === true, 'message: checkEqual(1, 1) should return true');", - "assert(checkEqual(1, -1) === false, 'message: checkEqual(1, -1) should return false');" - ], - "type": "waypoint", - "challengeType": 1, - "translations": {} - }, { "id": "587d7b7e367417b2b2512b23", - "title": "Use the parseInt function", + "title": "Use the parseInt Function", "description": [ - "The parseInt() function parses a string and returns an integer.", + "The parseInt() function parses a string and returns an integer. Here's an example:", "var a = parseInt(\"007\");", - "The above function will convert the string \"007\" to an integer 7." + "The above function converts the string \"007\" to an integer 7. If the first character in the string can't be converted into a number, then it returns NaN.", + "
", + "Use parseInt() in the convertToInteger function so it converts the input string str into an integer, and returns it." ], "challengeSeed": [ "function convertToInteger(str) {", - "", + " ", "}", + "", "convertToInteger(\"56\");" ], "tail": [], "solutions": [], "tests": [ + "assert(/parseInt/g.test(code), 'message: convertToInteger should use the parseInt() function');", "assert(typeof(convertToInteger(\"56\")) === \"number\", 'message: convertToInteger(\"56\") should return a number');", "assert(convertToInteger(\"56\") === 56, 'message: convertToInteger(\"56\") should return 56');", - "assert(convertToInteger(\"77\") === 77, 'message: convertToInteger(\"56\") should return 77');", - "assert(!isNaN(convertToInteger(\"JamesBond\")); , 'message: convertToInteger(\"JamesBond\") should return NaN');" + "assert(convertToInteger(\"77\") === 77, 'message: convertToInteger(\"77\") should return 77');", + "assert.isNaN(convertToInteger(\"JamesBond\"), 'message: convertToInteger(\"JamesBond\") should return NaN');" ], "type": "waypoint", "challengeType": 1, @@ -5651,26 +5617,28 @@ }, { "id": "587d7b7e367417b2b2512b22", - "title": "Use the parseInt function with a radix", + "title": "Use the parseInt Function with a Radix", "description": [ - "The parseInt() function parses a string and returns an integer. The radix variable defines the number system to convert from.", + "The parseInt() function parses a string and returns an integer. It takes a second argument for the radix, which specifies the base of the number in the string. The radix can be an integer between 2 and 36.", "The function call looks like:", - "parseInt(string, radix);", - "var a = parseInt(\"11\", 2);", - "Here the radix variable defines that \"11\" is in binary system.", - "The above function will convert the string \"11\" to an integer 3.", - "Instructions", - "Using the parseInt() function, write a function that converts binary numbers to integers and returns them." + "parseInt(string, radix);", + "And here's an example:", + "var a = parseInt(\"11\", 2);", + "The radix variable says that \"11\" is in the binary system, or base 2. This example converts the string \"11\" to an integer 3.", + "
", + "Use parseInt() in the convertToInteger function so it converts a binary number to an integer and returns it." ], "challengeSeed": [ "function convertToInteger(str) {", - "", + " ", "}", + "", "convertToInteger(\"10011\");" ], "tail": [], "solutions": [], "tests": [ + "assert(/parseInt/g.test(code), 'message: convertToInteger should use the parseInt() function');", "assert(typeof(convertToInteger(\"10011\")) === \"number\", 'message: convertToInteger(\"10011\") should return a number');", "assert(convertToInteger(\"10011\") === 19, 'message: convertToInteger(\"10011\") should return 19');", "assert(convertToInteger(\"111001\") === 57, 'message: convertToInteger(\"111001\") should return 57');", @@ -5681,43 +5649,68 @@ "translations": {} }, { - "id": "587d7b7e367417b2b2512b21", - "title": "Use multiple Conditional Ternary Operators", + "id": "587d7b7e367417b2b2512b24", + "title": "Use the Conditional (Ternary) Operator", "description": [ - "In the previous challenge, we used a single conditional operator. Now, we will learn how to use multiple conditionals.", - "For example:", - "function findGreaterOrEqual(a, b, c) {", - " if(a === b)", - " return \"a and b are equal\";", - " else if(a > b)", - " return \"a is greater\";", - " else", - " return \"b is greater\";", - "}", - "The above function can be written using multiple conditionals like:", - "function findGreaterOrEqual(a, b) {", - " return (a === b) ? \"a and b are equal\" : (a > b) ? \"a is greater\" : \"b is greater\";", - "}", - "Note that the conditional operator is Right Assosiative.", - "Instructions", - "Using a Conditional Operator, check if a number is positive, negative or zero." + "The conditional operator, also called the ternary operator, can be used as a one line if-else expression.", + "The syntax is:", + "condition ? statement-if-true : statement-if-false;", + "The following function uses an if-else statement to check a condition:", + "
function findGreater(a, b) {
if(a > b) {
return \"a is greater\";
}
else {
return \"b is greater\";
}
}
", + "This can be re-written using the conditional operator:", + "
function findGreater(a, b) {
return a > b ? \"a is greater\" : \"b is greater\";
}
", + "
", + "Use the conditional operator in the checkEqual function to check if two numbers are equal or not. The function should return either true or false." + ], + "challengeSeed": [ + "function checkEqual(a, b) {", + " ", + "}", + "", + "checkEqual(1, 2);" + ], + "tail": [], + "solutions": [], + "tests": [ + "assert(/.+?\\s*?\\?\\s*?.+?\\s*?:\\s*?.+?/gi.test(code), 'message: checkEqual should use the conditional operator');", + "assert(checkEqual(1, 2) === false, 'message: checkEqual(1, 2) should return false');", + "assert(checkEqual(1, 1) === true, 'message: checkEqual(1, 1) should return true');", + "assert(checkEqual(1, -1) === false, 'message: checkEqual(1, -1) should return false');" + ], + "type": "waypoint", + "challengeType": 1, + "translations": {} + }, + { + "id": "587d7b7e367417b2b2512b21", + "title": "Use Multiple Conditional (Ternary) Operators", + "description": [ + "In the previous challenge, you used a single conditional operator. You can also chain them together to check for multiple conditions.", + "The following function uses if, else if, and else statements to check multiple conditions:", + "
function findGreaterOrEqual(a, b) {
if(a === b) {
return \"a and b are equal\";
}
else if(a > b) {
return \"a is greater\";
}
else {
return \"b is greater\";
}
}
", + "The above function can be re-written using multiple conditional operators:", + "
function findGreaterOrEqual(a, b) {
return (a === b) ? \"a and b are equal\" : (a > b) ? \"a is greater\" : \"b is greater\";
}
", + "
", + "Use multiple conditional operators in the checkSign function to check if a number is positive, negative or zero." ], "challengeSeed": [ "function checkSign(num) {", - "", + " ", "}", + "", "checkSign(10);" ], "tail": [], "solutions": [], "tests": [ - "assert(checkSign(10) === 'positive', 'message: checkSign(10) should return positive');", - "assert(checkSign(-12) === 'negative', 'message: checkSign(-12) should return negative');", - "assert(checkSign(0) === 'zero', 'message: checkSign(0) should return zero');" + "assert(/.+?\\s*?\\?\\s*?.+?\\s*?:\\s*?.+?\\s*?\\?\\s*?.+?\\s*?:\\s*?.+?/gi.test(code), 'message: checkSign should use multiple conditional operators');", + "assert(checkSign(10) === 'positive', 'message: checkSign(10) should return \"positive\". Note that capitalization matters');", + "assert(checkSign(-12) === 'negative', 'message: checkSign(-12) should return \"negative\". Note that capitalization matters');", + "assert(checkSign(0) === 'zero', 'message: checkSign(0) should return \"zero\". Note that capitalization matters');" ], "type": "waypoint", "challengeType": 1, "translations": {} } ] -} \ No newline at end of file +}