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What is the difference between async.waterfall and async.series
...ction to the next, then when done will call the main callback, passing its error, if an error happens.
The difference is that async.series(), once the series have finished, will pass all the results to the main callback. async.waterfall() will pass to the main callback only the result of the last f...
Check if array is empty or null
...ery. I tried array.length === 0 but it didn't work. It did not throw any error either.
4 Answers
...
How to validate an email address in JavaScript
... reject any valid addresses [^@]+@[^@]+\.[^@]+ and protects against common errors.
– Vroo
Oct 26 '12 at 6:32
...
What's the best way to parse command line arguments? [closed]
...
print(args.switch)
5) Check Values
if args.pos_arg > 10:
parser.error("pos_arg cannot be larger than 10")
Usage
Correct use:
$ ./app 1 2 --opt_arg 3 --switch
Argument values:
1
2
3
True
Incorrect arguments:
$ ./app foo 2 --opt_arg 3 --switch
usage: convert [-h] [--opt_arg OPT_ARG]...
Why and How to avoid Event Handler memory leaks?
...ll
– Davi Fiamenghi
Apr 23 '15 at 4:05
6
...
Go build: “Cannot find package” (even though GOPATH is set)
...onment variables several times it still didn't work. I encountered several errors including 'Cannot find package' and 'unrecognized import path'. After trying to reinstall with this solution by the instructions on golang.org (including the uninstall part) still encountered problems.
Took me some ti...
How do you create a dictionary in Java? [closed]
...", "value");
String value = dictionary.get("key");
Works but gives an error you need to keep the constructor class same as the declaration class. I know it inherits from the parent class but, unfortunately it gives an error on runtime.
Map<String, String> dictionary = new Map<String,...
laravel throwing MethodNotAllowedHttpException
...
You are getting that error because you are posting to a GET route.
I would split your routing for validate into a separate GET and POST routes.
New Routes:
Route::post('validate', 'MemberController@validateCredentials');
Route::get('validate'...
Get image data url in JavaScript?
... and un-multiplied.
All browsers and devices will have different rounding errors happening in this process
(see Canvas fingerprinting).
So if one wants a base64 version of an image file, they have to request it again (most of the time it will come from cache) but this time as a Blob.
Then you c...
Is it possible to use getters/setters in interface definition?
...eadonly value: number;
}
let foo: Foo = { value: 10 };
foo.value = 20; //error
class Bar implements Foo {
get value() {
return 10;
}
}
but as far as I'm aware, and as others mentioned, there is no way currently to define a set-only property in the interface. You can, however, move the l...