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Cast to int vs floor
...ster than floor.
I have code that needs the floor operation of a limited range of values, including negative numbers. And it needs to be very efficient, so we use the following function for it:
int int_floor(double x)
{
return (int)(x+100000) - 100000;
}
Of course this will fail for very...
Creating dataframe from a dictionary where entries have different lengths
... answered May 3 '18 at 23:00
OrangeSherbetOrangeSherbet
1,2371212 silver badges2020 bronze badges
...
finding and replacing elements in a list
...
a = [1,2,3,4,5,1,2,3,4,5,1,12]
for i in range (len(a)):
if a[i]==2:
a[i]=123
You can use a for and or while loop; however if u know the builtin Enumerate function, then it is recommended to use Enumerate.1
...
Find the last element of an array while using a foreach loop in PHP
...ators as well, especially as it has been asked for a standard way:
$arr = range(1, 3);
$it = new CachingIterator(new ArrayIterator($arr));
foreach($it as $key => $value)
{
if (!$it->hasNext()) echo 'Last:';
echo $value, "\n";
}
You might find something that does work more flexible for ...
Learning Regular Expressions [closed]
... means it matches exactly one of the enclosed characters. You can also use ranges in character classes, so [a-c] matches either 'a' or 'b' or 'c'.
The pattern . is special: rather than matching a literal dot only, it matches any character†. It's the same conceptually as the really big character c...
How do I create test and train samples from one dataframe with pandas?
...ay of size len(df) with randomly and uniformly distributed float values in range [0, 1]. The < 0.8 applies the comparison element-wise and stores the result in place. Thus values < 0.8 become True and value >= 0.8 become False
– Kentzo
Dec 6 '18 at 0:4...
What's the fastest way to convert String to Number in JavaScript?
... @JosephGoh: When I get a chance I will extend the results to include int range overflow. Generally, if the numbers are that big you have a very special interface going on so would need to be aware of overflow. Cheers
– Gone Coding
Nov 27 '17 at 9:10
...
SQL query to select dates between two dates
...of date 00:00:00.000, if you want to be sure you get all the dates in your range, you must either supply the time for your ending date or increase your ending date and use <.
select Date,TotalAllowance from Calculation where EmployeeId=1
and Date between '2011/02/25' and '2011/02/27 23:59:59.99...
Git blame — prior commits?
...
You can use git log -L to view the evolution of a range of lines.
For example :
git log -L 15,23:filename.txt
means "trace the evolution of lines 15 to 23 in the file named filename.txt".
share
...
Where is Java's Array indexOf?
...List(list).sublist(from,to).indexOf(o) to search for an element within the range [from, to).
– Mario Carneiro
Jan 14 '16 at 22:23
...