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Understanding index++ in single line of code


By : NoLer Allidros
Date : September 15 2020, 03:00 PM
wish helps you Your understanding is correct.
The postfix increment operator ++ evaluates to the current value of its operand, and as a side effect increments its operand. The effect of the increment is guaranteed to be visible at the next sequence point.
code :


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Jquery Array - how to condense multiple index initialisations to a single line of code


By : user2369069
Date : March 29 2020, 07:55 AM
To fix the issue you can do You should use object {} instead when you need a "hash" in javascript:
code :
var example = {};
example['hours'] = 0;
example['overtime'] = 0;
example['income'] = 0;
example['expenditure'] = 0;
// the quote could be ommitted.
var example = { 'hours': 0, 'overtime': 0, 'income': 0, 'expenditure': 0 };

I have problems understanding the syntax of this code. Can someone explain it line by line?


By : Paul Bradford
Date : March 29 2020, 07:55 AM
I hope this helps you . I am learning about functional programming. I have understood the principle and now I try to learn specifics. This code is supposed to find out if n is a prime or not. I don't understand what the first line is doing. I suggest it wants an integer to be a boolean value in the function(do you call it that?) 'isPrime'.
code :
isPrime :: Integer -> Bool
isPrime n = (factors n == [])
where
factors n = [ x | x <- [2..n-1], n `mod` x == 0 ]
[ x | x <- [2..n-1], n `mod` x == 0 ]

Am not understanding how the index() line work


By : Alicia
Date : March 29 2020, 07:55 AM
this will help choice.index(p1) == (choice.index(p2) + 1) is true when the position of p2 in the list is one more than the position of p1 in the list, i.e. p2 is right after p1 in the list.
choice.index(p1) == (choice.index(p2) + 1) % 3 is the same thing, but it considers the start of the list to come right after the end of the list. The end of the list is index 2 (choice[2] == 'scissors'), 2 + 1 is 3, and 3 % 3 is 0 – the start of the list.

How to map values of different data types in a single line of code from a single line of input in python3?


By : HideNSeek
Date : March 29 2020, 07:55 AM
seems to work fine Suppose the input is: string integer integer. Now i need to map only the 2nd and 3rd input to integer. , You could also do this:
code :
name, d, j = input().split()
d,j = map(int,[d,j])

pandas Series.index behaviour not allowing to reassign index in a single-line operation


By : Wbdesinger
Date : March 29 2020, 07:55 AM
To fix this issue You could use the add_suffix method:
code :
ss = df[col_list].mean().add_suffix('_avg')
In [75]: ss = pd.Series([1,2,3], list('ABC'))

In [76]: ss.add_suffix('_avg')
Out[76]: 
A_avg    1
B_avg    2
C_avg    3
dtype: int64
In [77]: ss.add_prefix('col_')
Out[77]: 
col_A    1
col_B    2
col_C    3
dtype: int64
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