Delete Digit

Description

Given some integer, find the maximal number you can obtain by deleting exactly one digit of the given number.

Example

For n = 152, the output should be deleteDigit(n) = 52;
For n = 1001, the output should be deleteDigit(n) = 101.

Input/Output

[execution time limit] 4 seconds (js)
[input] integer n

Guaranteed constraints: 10 \leq n \leq 10^6.

[output] integer

[JavaScript (ES6)] Syntax Tips

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// Prints help message to the console
// Returns a string
function helloWorld(name) {
    console.log("This prints to the console when you Run Tests");
    return "Hello, " + name;
}

Solution

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function deleteDigit(n) {
    var s = String(n).split('').map(Number)
    return Math.max(...s.map((el,i)=>{var r = s.slice(); r.splice(i,1); return Number( r.join(''))}))
}