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Why is there no std::stou?
...n stoul and a hypothetical stou would be a check that the result is in the range of unsigned:
unsigned stou(std::string const & str, size_t * idx = 0, int base = 10) {
unsigned long result = std::stoul(str, idx, base);
if (result > std::numeric_limits<unsigned>::max()) {
...
C++, copy set to vector
...n output iterator directly to std::copy, you must make sure it points to a range that is at least large enough to hold the input range.
std::back_inserter creates an output iterator that calls push_back on a container for each element, so each element is inserted into the container. Alternatively,...
How do you calculate the average of a set of circular data? [closed]
.... The first line computes the relative angle of a with respect to b in the range [-180, 179], the second computes the middle angle from that. I'd use b + diff/2 instead of a - diff/2 for clarity.
– starblue
Jul 21 '09 at 14:42
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Initialise a list to a specific length in Python [duplicate]
...ally-empty dict ten times, not ten distinct ones. Rather, use [{} for i in range(10)] or similar constructs, to construct ten separate dicts to make up your list.
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Can I convert long to int?
...method
But it will throw an OverflowException if it the value is outside range of the Int32 Type.
A basic test will show us how it works:
long[] numbers = { Int64.MinValue, -1, 0, 121, 340, Int64.MaxValue };
int result;
foreach (long number in numbers)
{
try {
result = Convert.ToInt32...
Get key by value in dictionary
...n each method 100000 times:
Method 1:
>>> profile.run("for i in range(0,100000): method1(list,16)")
200004 function calls in 1.173 seconds
Method 2:
>>> profile.run("for i in range(0,100000): method2(list,16)")
200004 function calls in 1.222 seconds
Method 3:
>...
Type erasure techniques
...
I would also consider (similar to void*) the use of "raw storage": char buffer[N].
In C++0x you have std::aligned_storage<Size,Align>::type for this.
You can store anything you want in there, as long as it's small enough and you deal with the alignment properly.
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How do I retrieve the number of columns in a Pandas data frame?
...re using read_csv method of Pandas without sep parameter or sep with ",".
raw_data = pd.read_csv("a1:\aa2/aaa3/data.csv")
raw_data.info()
<class 'pandas.core.frame.DataFrame'>
RangeIndex: 5144 entries, 0 to 5143
Columns: 145 entries, R_fighter to R_age
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How to 'minify' Javascript code
... HTTP::Request;
use Fcntl;
my %api = ( css => 'https://cssminifier.com/raw', js => 'https://javascript-minifier.com/raw' );
my $DEBUG = 0;
my @files = @ARGV;
unless ( scalar(@files) ) {
die("Filename(s) not specified");
}
my $ua = LWP::UserAgent->new;
foreach my $file (@files) {
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Javascript - get array of dates between 2 dates
I'd like "range" to be an array of date objects, one for each day between the two dates.
24 Answers
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