0048【Edabit ★☆☆☆☆☆】【字符串拼接】Concatenate First and Last Name into One String

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0048【Edabit ★☆☆☆☆☆】【字符串拼接】Concatenate First and Last Name into One String

formatting language_fundamentals strings

Instructions

Given two strings, firstName and lastName, return a single string in the format “last, first”.

Examples

concatName("First", "Last") // "Last, First"
concatName("John", "Doe") // "Doe, John"
concatName("Mary", "Jane") // "Jane, Mary"

Notes

Don’t forget to return the result.

Solutions

function concatName(firstName, lastName) {return lastName.concat(", ").concat(firstName);
}

TestCases

let Test = (function(){return {assertEquals:function(actual,expected){if(actual !== expected){let errorMsg = `actual is ${actual},${expected} is expected`;throw new Error(errorMsg);}},assertSimilar:function(actual,expected){if(actual.length != expected.length){throw new Error(`length is not equals, ${actual},${expected}`);}for(let a of actual){if(!expected.includes(a)){throw new Error(`missing ${a}`);}}}}
})();Test.assertEquals(concatName("John", "Doe"), "Doe, John")
Test.assertEquals(concatName("First", "Last"), "Last, First")
Test.assertEquals(concatName("A", "B"), "B, A")// In case someone is making odd assumptions about comma characters.
Test.assertEquals(concatName(",", ","), ",, ,")