for-loop Questions
4
Solved
6
15
I have a dataframe (df) and want to print the unique values from each column in the dataframe.
I need to substitute the variable (i) [column name] into the print statement
column_list = df.column...
13
Solved
I understand that the basic for...of syntax in JavaScript looks like this:
for (let obj of myArray) {
// ...
}
But how do I get the loop counter/index when iterating with this syntax?
(With the s...
Hospitium asked 16/4, 2012 at 18:47
6
Solved
now i'm trying to make reversed for a loop.The simple way of reverse for is
for(i in start downTo end)
but,what if I use array as a start/end point?
5
Solved
I am trying to call a function from within a loop in a way that when the function finishes executing, the loop continues to the next iteration and calls it again. But instead the loop doesn't wait ...
Inconsiderate asked 19/8, 2013 at 10:52
11
Solved
What is the pythonic way of looping through a range of numbers and skipping over one value? For example, the range is from 0 to 100 and I would like to skip 50.
Edit:
Here's the code that I'm usin...
5
9
Solved
I have two iterables, and I want to go over them in pairs:
foo = [1, 2, 3]
bar = [4, 5, 6]
for (f, b) in iterate_together(foo, bar):
print("f:", f, " | b:", b)
That should re...
5
Solved
How can I break out of a for loop in jinja2?
my code is like this:
<a href="#">
{% for page in pages if page.tags['foo'] == bar %}
{{page.title}}
{% break %}
{% endfor %}
</a>
I hav...
2
Solved
In plpgsql, I want to get the array contents one by one from a two dimension array.
DECLARE
m varchar[];
arr varchar[][] := array[['key1','val1'],['key2','val2']];
BEGIN
for m in select arr LOOP...
Beelzebub asked 20/3, 2012 at 8:21
21
Solved
In C, what is the difference between using ++i and i++, and which should be used in the incrementation block of a for loop?
Firenze asked 24/8, 2008 at 5:19
3
Solved
Here is my simple anonymous code block:
do $$
declare foo varchar(50) := '';
begin
for a in
select a from (values('foo'), ('bar'), ('fooBar')) s(a)
loop
foo := a;
print foo;
end loop;
end;...
Pepillo asked 11/4, 2013 at 12:54
6
Solved
I am trying to print the common letters from two different user inputs using a for loop. (I need to do it using a for loop.) I am running into two problems: 1. My statement "If char not in output.....
Vaccinia asked 4/2, 2018 at 18:20
3
Solved
I'm using python 3.2.2 on windows 7 and I'm trying to create a program which accepts 7 numbers and then tells the user how many are positive, how many are negative and how many are zero. This is wh...
Paste asked 14/11, 2011 at 10:10
5
Solved
When ranging over an array, two values are returned for each iteration. The first is the index, and the second is a copy of the element at that index.
Here's my code:
var myArray = [5]int {1,2,3,...
2
Solved
I am curious to understand how Python for loops work under the hood. I tried to implement it somewhat like the following code snippet, is that how the for loop has been implemented?
my_list = [1, ...
Gilbertogilbertson asked 27/1, 2019 at 12:0
5
Solved
I don't know if that's been asked before, but I haven't been able to find an answer, nonetheless. My question is this; in For loops, this is acceptable.
int k = 0;
for (int i = 0; i <= 10; i++...
5
Solved
I am looking for some file names in a list using a wildcard.
from datetime import date
dt = str("RT" + date.today().strftime('%d%m'))
print dt # RT0701
Basically I need to find this pattern dt +...
6
Solved
Here's my json:
{"d":{"key1":"value1",
"key2":"value2"}}
Is there any way of accessing the keys and values (in javascript) in this array without knowing what the keys are?
The reason my json i...
Bipinnate asked 25/2, 2011 at 5:9
6
Solved
I want to annotate a type of a variable in a for-loop. I tried this but it didn't work:
for i: int in range(5):
pass
What I expect is working autocomplete in PyCharm 2016.3.2, but using
pre-annot...
Noah asked 13/1, 2017 at 18:47
2
My problem is like this:
I have several lists need to be permuted, but the list numbers are unknowable. And every element numbers in every list are also unknowable. Sicne I would like to traverse ...
15
Solved
Python has an interesting for statement which lets you specify an else clause.
In a construct like this one:
for i in foo:
if bar(i):
break
else:
baz()
the else clause is executed after the ...
4
Solved
I have a std::vector<std::string> v; (initialized). How can I use the range-for loop for accessing all elements except the first one (on index zero). For all elements:
for (const string &...
23
Solved
Is there a difference in ++i and i++ in a for loop? Is it simply a syntax thing?
Bolognese asked 27/1, 2009 at 17:53
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