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Using .NET, how can you find the mime type of a file based on the file signature not the extension
...MimeFromData.
From the documentation
MIME type detection, or "data sniffing," refers to the process of determining an appropriate MIME type from binary data. The final result depends on a combination of server-supplied MIME type headers, file extension, and/or the data itself. Usually, only th...
Check if event exists on element [duplicate]
Is there a way to check if an event exists in jQuery? I’m working on a plugin that uses custom namespaced events, and would like to be able to check if the event is binded to an element or not.
...
How to find whether or not a variable is empty in Bash
How can I check if a variable is empty in Bash?
10 Answers
10
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How can I get screen resolution in java?
...isplayMode().getWidth();
int height = gd.getDisplayMode().getHeight();
If you want to get the screen resolution in DPI you'll have to use the getScreenResolution() method on Toolkit.
Resources :
javadoc - Toolkit.getScreenSize()
Java bug 5100801- Toolkit.getScreenSize() does not return the ...
Prevent segue in prepareForSegue method?
...ter:
You have to implement the method
- (BOOL)shouldPerformSegueWithIdentifier:(NSString *)identifier sender:(id)sender
In your view controller. You do your validation there, and if it's OK then return YES; if it's not then return NO; and the prepareForSegue is not called.
Note that this metho...
Display help message with python argparse when script is called without any arguments
... is triggered. For example, test.py --blah will print the help message
too if --blah isn't a valid option.
If you want to print the help message only if no arguments are supplied on the
command line, then perhaps this is still the easiest way:
import argparse
import sys
parser=argparse.ArgumentPa...
How do I use the conditional operator (? :) in Ruby?
...C (the parenthesis are not required). It's an expression that works like:
if_this_is_a_true_value ? then_the_result_is_this : else_it_is_this
However, in Ruby, if is also an expression so: if a then b else c end === a ? b : c, except for precedence issues. Both are expressions.
Examples:
puts (...
Checking for the correct number of arguments
How do i check for the correct number of arguments (one argument). If somebody tries to invoke the script without passing in the correct number of arguments, and checking to make sure the command line argument actually exists and is a directory.
...
Override intranet compatibility mode IE8
...
(to clarify: It works for the document mode, but not browser mode)
– codeulike
Oct 20 '11 at 17:50
21
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Why do we need the “finally” clause in Python?
...
It makes a difference if you return early:
try:
run_code1()
except TypeError:
run_code2()
return None # The finally block is run before the method returns
finally:
other_code()
Compare to this:
try:
run_code1()
...