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Argparse: Way to include default values in '--help'?
... Don't forget to include the variable 'type' in your formatting string-- e.g. '%(default)s' for a string, or '%(default)d' for a digit.
– strongMA
Jan 23 '14 at 22:26
2
...
How to check file MIME type with javascript before upload?
...r = "";
for(var i = 0; i < arr.length; i++) {
header += arr[i].toString(16);
}
console.log(header);
// Check the file signature against known types
};
fileReader.readAsArrayBuffer(blob);
You can then determine the real MIME type like so (more file signatures here and here):
swit...
Regular expression matching a multiline block of text
...eak
acids.append( line )
At this point you have someVaryingText as a string, and the acids as a list of strings.
You can do "".join( acids ) to make a single string.
I find this less frustrating (and more flexible) than multiline regexes.
...
Get current controller in view
...ttpContext.Current.Request.RequestContext.RouteData.Values["controller"].ToString()
in the same kind of situation you describe, and it shows the controller described in the URL (Category for you, Product for me), instead of the actual location of the partial view.
So use this alert instead:
aler...
@Nullable annotation usage
...n Java8 or later there is a bit cleaner approach than an if block.
public String foo(@Nullable String mayBeNothing) {
return Optional.ofNullable(mayBeNothing).orElse("Really Nothing");
}
You can also throw some exception in there by swapping .orElse to
orElseThrow(() -> new Exception("Dont...
How do you track record relations in NoSQL?
...e there should be a more sophisticated approach than just keeping track of strings of ids manually. For one, you can only go so far before they get to big to be useful. Then again, the NoSQL technology's main poster-child projects (MongoDB, CouchDB, Membase, etc) are all new projects so perhaps I ju...
“unrecognized selector sent to instance” error in Objective-C
...ction:@selector(xxxButtonClick:)
or (as in my case)
action:NSSelectorFromString([[NSString alloc] initWithFormat:@"%@BtnTui:", name.lowercaseString])
If you place a colon at the end of the string - it will pass the sender. If you do not place the colon at the end of the string it will not, and t...
How do you implement a private setter when using an interface?
...terface you can define only getter for your property
interface IFoo
{
string Name { get; }
}
However, in your class you can extend it to have a private setter -
class Foo : IFoo
{
public string Name
{
get;
private set;
}
}
...
Understanding __get__ and __set__ and Python descriptors
...
Why do I need the descriptor class?
It gives you extra control over how attributes work. If you're used to getters and setters in Java, for example, then it's Python's way of doing that. One advantage is that it looks to users just like an attribute (there's no change in sy...
How to get distinct values from an array of objects in JavaScript?
... this answer is more concise and applies to all data types instead of just strings.
– jgosar
Nov 11 '19 at 8:28
1
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