CHALLENGE: Sort a list by it's Float Element in tuple

Question

Program to sort a list by it's Float element(which is string) in tuple.

Sample Data:
[('ABC','11.75'),('DEF','10.90'),('GHI','8.50')]

Output:
[('GHI','8.50'),('DEF','10.90'),('ABC','11.75')]

I know Python coding, other languages it's open.

Answer 1

@Ferhat:

It's not easy to be extensive, but some things:

In fact, you continue to think too much complicated...

+ First, in your last code, you define a variable named 'sort' by assigning it a lambda function, so the built-in sort() function is no more accessible (and you not really use it but your lambda function)

+ Next, sort() and sorted() (work on same model, one modify the list, the other return the sorted list) could get named arguments:

> 'key', wich expect a function (named or lambda) wich take one argument the item iterated, and should return the value to be use for the sort (comparison with other items)

> 'reverse', wich default value is False to perform an ascending sort, but could be set to True if you want reverse the sort (descending one)

So, if you have a list of list (or object), you can just do:

def mysort(item):
return item[n] # with n set to the index/key on wich you want to sort the outerlist

data = [[...],[...],...]
sorted_data = data.sorted(key=mysort, reverse=True)
sort(data, key=mysort, reverse=True)

The user sort function can be as complex as wanted, and obviously, you can use lambda function if you can onlining the function (in case of just selecting the key/index on wich operate the sort, that's really less verbose and even readable, as you have seen in my first post here ;)

Answer 2

Technically therre are no floats in your tuples, alk strings haha

Answer 3

# Python:

data = [('ABC','11.75'),('DEF','10.90'),('GHI','8.50')]

print(sorted(data,key=lambda item: float(item[1])))

# @Luka: that's not Python? in what language is your solution coded?

Answer 4

@Ferhat Sevim:

I upvote your post as an encouragement, because I think you're in the good track for learning, but: why do simple when we could do hard? ;)

Check the sort() and sorted() method of list (and my submited solution in onelined Python), if not already done: your code doesn't require all this "collections" stuff... even if by the way, you've learn some interesting things which could be useful in another project ^^

Answer 5

@Ferhat Sevim:

Yep!
It's clearer now, isn't it?
But, your code only work for this particular list case, because in reality you are ordering the list by the first ([0] index) item value, reversly ;P
Don't use reverse, and use index [1] instead [0] ;)

@iddu:

While I was writting this answer, I had received a notification of you having marked one of mine answer as best, but it seems that you've retrieve it quickly... is that a mistake?

Answer 6

Maybe this isn't exactly what you want.
First one can be what you want.
I have learned new things anyway.
https://code.sololearn.com/c0o4hZ6tlFS4/?ref=app

Answer 7

@Visph,
Thanks for your explanation, I solved it now. See below:
https://code.sololearn.com/cB3Uq808UE2J/?ref=app

Answer 8

@visph:
Thanks for your response. I have checked sorted that you already posted and sort() I have tried it and didn't get same result.
Surely! :)

Answer 9

@visph... cool answer...

Answer 10

@luka.. great.. at first i thought it might be c . thanks for update .

Answer 11

@Ferhat Sevim.. thanks for the answer..