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How to detect a Christmas Tree? [closed]
...ntaining (uint, 0-255) color image
hueleftthr: Scalar constant to select maximum allowed hue in the
yellow-green region
huerightthr: Scalar constant to select minimum allowed hue in the
blue-purple region
satthr: Scalar constant t...
How to search a Git repository by commit message?
...Cgreen%H %Cblue%s\n%b%Creset\" --name-status --grep. Note the --all and %b chars. Thx @AshleyCoolman for the reset tip.
– arcol
Feb 22 '16 at 14:27
1
...
Length of string in bash
...NG=C LC_ALL=C
bytlen=${#myvar}
LANG=$oLang LC_ALL=$oLcAll
printf "%s is %d char len, but %d bytes len.\n" "${myvar}" $chrlen $bytlen
will render:
Généralités is 11 char len, but 14 bytes len.
you could even have a look at stored chars:
myvar='Généralités'
chrlen=${#myvar}
oLang=$LANG oLc...
Is char signed or unsigned by default?
In the book "Complete Reference of C" it is mentioned that char is by default unsigned.
7 Answers
...
How to read a CSV file into a .NET Datatable
...e(path);
string fileName = Path.GetFileName(path);
string sql = @"SELECT * FROM [" + fileName + "]";
using(OleDbConnection connection = new OleDbConnection(
@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + pathOnly +
";Extended Properties=\"Text;HDR=" + h...
How to Calculate Execution Time of a Code Snippet in C++
...;boost/progress.hpp>
using namespace boost;
int main (int argc, const char * argv[])
{
progress_timer timer;
// do stuff, preferably in a 100x loop to make it take longer.
return 0;
}
When progress_timer goes out of scope it will print out the time elapsed since its creation.
UPDATE:...
Random “Element is no longer attached to the DOM” StaleElementReferenceException
... typing in your text inside the input element. The solution is to send one character at a time and search again for the input element. (Ex. in ruby shown below)
def send_keys_eachchar(webdriver, elem_locator, text_to_send)
text_to_send.each_char do |char|
input_elem = webdriver.find_element(e...
How to manually expand a special variable (ex: ~ tilde) in bash
...safer and better solutions. Preferably, I'd go with either of these two:
Charle's Duffy's solution
Håkon Hægland's solution
Original answer for historic purposes (but please don't use this)
If I'm not mistaken, "~" will not be expanded by a bash script in that manner because it is treated a...
How to achieve code folding effects in Emacs?
...on: C-h k C-x $
tells us that the above key combination is calling
set-selective-display, a function that takes one numerical argument
(the M-1 prefix passes 1 as the value of that argument) and,
unsurprisingly, sets the variable selective-display to the value of
that argument.
from mino...
How to convert a data frame column to numeric type?
...ertain "conversion anomaly":
# create dummy data.frame
d <- data.frame(char = letters[1:5],
fake_char = as.character(1:5),
fac = factor(1:5),
char_fac = factor(letters[1:5]),
num = 1:5, stringsAsFactors = FALSE)
Let us have a ...