CODEWITHSUNDEEP
pythonstringstring-length
noob81
noob81

Reputation: 65

Need more elegant solution to even string length

Here's the task I got:

Given a string of even length, return the first half. So the string "WooHoo" yields "Woo". 

first_half('WooHoo') → 'Woo'
first_half('HelloThere') → 'Hello'
first_half('abcdef') → 'abc'

Here's my solution:

def first_half(str):
    if len(str) % 2 == 0:
        b = len(str) // 2
        return str[:b]

My question is:

Can you show me a simpler solution in Python of course that doesn't require me to use a variable for half of the string length (b)?

Upvotes: 3

Views: 2986

Answers (5)

JUstice
JUstice

Reputation: 51

def first_half(str):
  calc = len(str) / 2
  if calc:
    return str[:calc]
    
  else:
    if len(str) <= 0:
      return str
    
first_half('abcdef')

Upvotes: 0

Nikhil G
Nikhil G

Reputation: 559

Here is the most simple and straight-forward solution.

Running until the middle of the string, here, // is used to confirm that I am getting only int values after dividing, in case the length is odd.

 def first_half(str):

     return str[:(len(str)//2)]

Upvotes: 2

Muhammad Imran
Muhammad Imran

Reputation: 744

In python:

return str[0: int(len( str )/2)];

here no need to check whether it's even or odd lenght. len( str )/2 will round itself.

Answered following before question re-edit:

In Javascript:

 var str = "WooHoo";
 if (str.length%2 == 0) {
     console.log(str.substr(0, str.length / 2));
    }

Answer is Woo.

Or just use:

str.substr(0, str.length / 2);

No need to check if (str.length%2 == 0).

Other languages have the length property, and substring function too.

Upvotes: 3

Nolin M.
Nolin M.

Reputation: 387

In python:

str = "WooHoo"   
str = str[:-len(str)/2]

Upvotes: 3

Coding Orange
Coding Orange

Reputation: 542

Are you looking for something like this:

def first_half(str):
    if len(str) % 2 == 0:
        return str[:len(str) // 2]

or maybe like this?

def first_half(str):
    return str[:len(str) // 2 if len(str) % 2 == 0 else 0]

This is quite vague as you haven't explained what to do when an uneven length string is provided.

Upvotes: 1

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