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Elegant ways to support equivalence (“equality”) in Python classes
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Consider this simple problem:
class Number:
def __init__(self, number):
self.number = number
n1 = Number(1)
n2 = Number(1)
n1 == n2 # False -- oops
So, Python by default uses the object identifiers for comparis...
IOS: create a UIImage or UIImageView with rounded corners
...iew with rounded corners? Because I want take an UIImage and show it inside an UIImageView , but I don't know how to do it.
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Pass all variables from one shell script to another?
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Also it is important to note that "" are necessary if we pass multiword strings.
Taking one more example
master.sh
#!/bin/bash
echo in master.sh
var1="hello world"
sh slave1.sh $var1
sh slave2.sh "$var1"
echo back to master
slave1.sh
#!/bin/bash
echo in slave1.sh
echo value :$1
slave2.sh
...
Change a Django form field to a hidden field
...alue.
also you may prefer to use in the view:
form.fields['field_name'].widget = forms.HiddenInput()
but I'm not sure it will protect save method on post.
Hope it helps.
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.htaccess rewrite to redirect root URL to subdirectory
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Just recently I spent a lot of time debugging why this didn't work on a site in Ubuntu Apache 2.4.7. Rewrite debugging showed the rule being hit and generating an INTERNAL REDIRECT. Then it seemed to just park that and look for an index page. Turns out that if mod_dir is enabled A...
What is the shortcut to Auto import all in Android Studio?
...re any way of auto importing (like in Eclipse Shift + Ctrl + O ) in Android Studio ?
11 Answers
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What exactly is metaprogramming?
...not in the trivial sense
that the source files contain
characters, and strings are one of the
data types supported by the language.
Lisp code, after it's read by the
parser, is made of data structures
that you can traverse.
If you understand how compilers work,
what's really going...
Appending to an object
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This answer expects you to know the id of the alert to be added. Well, if you already know that, then you can simply follow the original object format and do: alerts[3] = { app: 'hello3', message: 'message 3' }. With this you can access a message by id: alerts[...
How can I load storyboard programmatically from class?
...ur storyboard go to the Attributes inspector and set the view controller's Identifier. You can then present that view controller using the following code.
UIStoryboard *sb = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
UIViewController *vc = [sb instantiateViewControllerWithIdent...
How do I catch a PHP fatal (`E_ERROR`) error?
... because processing should not typically be recovered after a fatal error. String matching an output buffer (as suggested by the original post the technique described on PHP.net) is definitely ill-advised. It's simply unreliable.
Calling the mail() function from within an error handler method prove...