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Why does a RegExp with global flag give wrong results?
...'.match(re); // -> true
!!'Foo Bar'.match(re); // -> true
Note: !! converts it to a boolean and then inverts the boolean so it reflects the result.
Alternatively, you could just reset the lastIndex property:
result.push(re.test('Foo Bar'));
re.lastIndex = 0;
result.push(re.test('Foo Bar'))...
How to pass a variable from Activity to Fragment, and pass it back?
... * show the text at 'index'.
*/
public static DetailsFragment newInstance(int index) {
DetailsFragment f = new DetailsFragment();
// Supply index input as an argument.
Bundle args = new Bundle();
args.putInt("index", index);
f.setArguments(args);
return f;
}
Then inside th...
Duplicate symbols for architecture x86_64 under Xcode
...ally result in a larger executable (due to additional object code
loaded into the application), it will allow the successful creation of
effective Objective-C static libraries that contain categories on
existing classes.
https://developer.apple.com/library/content/qa/qa1490/_index.html
...
How to get a JavaScript object's class?
... }
}
return undefined;
}
It gets to the constructor function, converts it to string, and extracts the name of the constructor function.
Note that obj.constructor.name could have worked well, but it is not standard. It is on Chrome and Firefox, but not on IE, including IE 9 or IE 10 RT...
Have a reloadData for a UITableView animate when changing
...you have more than 0 sections!)
Another thing to note is that you may run into a NSInternalInconsistencyException if you attempt to simultaneously update your data source with this code. If this is the case, you can use logic similar to this:
int sectionNumber = 0; //Note that your section may be...
Clojure: reduce vs. apply
...vals 0) (vals 1) (vals 2))
we can say:
(apply some-fn vals)
and it is converted to be equivalent to:
(some-fn val1 val2 val3)
So, using "apply" is like "removing the parentheses" around the sequence.
share
|...
Pythonic way to find maximum value and its index in a list?
...
@Sven-Marnach Would numpy be faster, if I had to convert my list to a numpy array first? Would it be faster for the simple example [0,1,0]?
– tommy.carstensen
Sep 8 '13 at 23:33
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Check if a given Type is an Enum
I am writing a JsonConverter for Json.NET which should allow me to convert any enum's to a string value defined by a [Description] attribute.
...
How can strings be concatenated?
...
This method also allows you to 'concat' an int to string, which isn't possible directly with + (requires wrapping the int in a str())
– aland
Dec 8 '18 at 16:04
...
quick random row selection in Postgres
... postgres that contains couple of millions of rows. I have checked on the internet and I found the following
7 Answers
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