duckie | Javascript type checker & assertion library
kandi X-RAY | duckie Summary
kandi X-RAY | duckie Summary
A Javascript type annotation and assertion library with no dependecies. You can make it work anywhere as long as you have es5 shimed your environment.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of duckie
duckie Key Features
duckie Examples and Code Snippets
Community Discussions
Trending Discussions on duckie
QUESTION
I'm building a 2FA application, which scans a QR code. Then it parses the uri inside QR code and returns a totp code. However, I have a problem closing the CupertinoActionSheet using Navigator.of(context).pop().
I want it to work like that:
- When a user taps on "add" button, the Action Sheet shows up.
- When user clicks on "Scan QR code", the Action Sheet must close and then proceed with scanning.
Here's the error that shows ups when I have the code below: "Looking up a deactivated widget's ancestor is unsafe. At this point the state of the widget's element tree is no longer stable. To safely refer to a widget's ancestor in its dispose() method, save a reference to the ancestor by calling dependOnInheritedWidgetOfExactType() in the widget's didChangeDependencies() method."
Code: home_screen.dart ...ANSWER
Answered 2021-Mar-08 at 19:23I believe that the problem lies within this code fragment:
QUESTION
This is the error : TypeError: Cannot read property 'name' of undefined
Code :
...ANSWER
Answered 2020-Jan-08 at 08:18You can use like this
QUESTION
I have the following data frame:
...ANSWER
Answered 2019-Nov-29 at 13:53When you call combinations, the underlying c code set the dim attributes on the output. When it is a character, numeric or integer, it is converted into a matrix and then you can get a data.frame from it:
We can try this in R for characters and integers (like you have shown):
QUESTION
I have a bucket (logs
) in Amazon S3 (us-east-1
) with, unsurprisingly, logs, partitioned by application and date:
ANSWER
Answered 2018-Dec-19 at 18:01New SDK makes it easy to work with paginated results:
QUESTION
I am trying to extract information from a repeating set of rows containing many embedded 's. For the page, I am trying to write a scraper to get various elements from this page. For some reason, I can't find a way to get to the tag with the class that contains the information for each row. Further, I am not able to isolate the sections that I will need to extract the information. For reference, here is a sample of one row:
...ANSWER
Answered 2018-Jan-10 at 00:10This seems like an issue of multiple-class tags. I believe this question might help you figure out the solution.
QUESTION
I am trying to write a LINQ query in an MVC application that allows users to search multiple fields at the same time for resident information.
Here is an example of what I am trying to accomplish.
The user has 3 textboxes to search from:
...ANSWER
Answered 2017-Jul-30 at 15:18Instead of doing an overall or search ||
, it sounds like you want an and search &&
. But your test for empty search strings is wrong - you want to say a record matches if (search string is null) OR (search string is a match).
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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Install duckie
All the type-checker below will contain 2 functions:. For example: duckie.array.test('abcd') will return false, and duckie.array.assert('abcd') will throw an error.
test will return a boolean to indicate if the val belongs to the type
assert will throw an error if the val doesn't belong to the type
bool
string
number
undefined
null
array
object
anything, means any value.
oneOf(Array), any value that is one of the enums.
oneOfType([Type1, Type2..TypeN]), any value that belongs to one of the listed types.
maybe(Type), any value that belongs to the type or exactly equals to undefined or NaN.
arrayOf(Type), any value that is an array and all the items in the array is type Type
objectOf(/*definition*/), an object that contains the structure described with definition.
is an array.
each item is a Person
the definition of Person is: it has a name as String, age as Number and hobbies as Array of String.
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