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cv2.imshow command doesn't work properly in opencv-python
...on 2.7
The following simple code created a window of the correct name, but its content is just blank and doesn't show the image:
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Python decorators in classes
Can one write something like:
11 Answers
11
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Reading and writing binary file
I'm trying to write code to read a binary file into a buffer, then write the buffer to another file. I have the following code, but the buffer only stores a couple of ASCII characters from the first line in the file and nothing else.
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How do you convert a byte array to a hexadecimal string, and vice versa?
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Either:
public static string ByteArrayToString(byte[] ba)
{
StringBuilder hex = new StringBuilder(ba.Length * 2);
foreach (byte b in ba)
hex.AppendFormat("{0:x2}", b);
return hex.ToString();
}
or:
public static s...
parseInt(null, 24) === 23… wait, what?
Alright, so I was messing around with parseInt to see how it handles values not yet initialized and I stumbled upon this gem. The below happens for any radix 24 or above.
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Unable to import a module that is definitely installed
After installing mechanize , I don't seem to be able to import it.
32 Answers
32
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Placeholder in UITextView
My application uses an UITextView . Now I want the UITextView to have a placeholder similar to the one you can set for an UITextField .
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How do I tell CPAN to install all dependencies?
...onfiguration:
perl -MCPAN -e 'my $c = "CPAN::HandleConfig"; $c->load(doit => 1, autoconfig => 1); $c->edit(prerequisites_policy => "follow"); $c->edit(build_requires_install_policy => "yes"); $c->commit'
Or combine it with local::lib module for non-privileged users:
perl ...
Regular expression to match a line that doesn't contain a word
I know it's possible to match a word and then reverse the matches using other tools (e.g. grep -v ). However, is it possible to match lines that do not contain a specific word, e.g. hede , using a regular expression?
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How to add a delay for a 2 or 3 seconds [closed]
...follow
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edited Dec 18 '19 at 8:26
answered Mar 27 '11 at 14:46
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