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How to resolve “must be an instance of string, string given” prior to PHP 7?
...r to PHP 7 type hinting can only be used to force the types of objects and arrays. Scalar types are not type-hintable. In this case an object of the class string is expected, but you're giving it a (scalar) string. The error message may be funny, but it's not supposed to work to begin with. Given th...
Create array of symbols
...mber '11, but, starting from Ruby 2.0, there is a shorter way to create an array of symbols! This literal:
%i[address city state postal country]
will do exactly what you want.
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how to reference a YAML “setting” from elsewhere in the same YAML file?
...g custom tags. Example in Python, making the !join tag join strings in an array:
import yaml
## define custom tag handler
def join(loader, node):
seq = loader.construct_sequence(node)
return ''.join([str(i) for i in seq])
## register the tag handler
yaml.add_constructor('!join', join)
#...
JavaScript pattern for multiple constructors
...is._constructInSomeOtherWay(a, b);
}
You can also access arguments as an array-like to get any further arguments passed in.
If you need more complex arguments, it can be a good idea to put some or all of them inside an object lookup:
function bar(argmap) {
if ('optionalparam' in argmap)
...
Best way to convert IList or IEnumerable to Array
...
Which version of .NET are you using? If it's .NET 3.5, I'd just call ToArray() and be done with it.
If you only have a non-generic IEnumerable, do something like this:
IEnumerable query = ...;
MyEntityType[] array = query.Cast<MyEntityType>().ToArray();
If you don't know the type withi...
Is there a literal notation for an array of symbols?
I like this literal expression for an array of strings:
2 Answers
2
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What is a NullReferenceException, and how do I fix it?
...tion
for p1.Books, it only translates to the p1.Books.Add(...) statements.
Array
int[] numbers = null;
int n = numbers[0]; // numbers is null. There is no array to index.
Array Elements
Person[] people = new Person[5];
people[0].Age = 20 // people[0] is null. The array was allocated but not
...
RESTful way to create multiple items in one request
...
I append the errors to an array, route the user to a 419 Conflict error page (and return that error to the client), and display the array of errors. See my answer below for more details.
– Eric Fuller
Oct 24 '13 ...
How do you split a list into evenly sized chunks?
...
I know this is kind of old but nobody yet mentioned numpy.array_split:
import numpy as np
lst = range(50)
np.array_split(lst, 5)
# [array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]),
# array([10, 11, 12, 13, 14, 15, 16, 17, 18, 19]),
# array([20, 21, 22, 23, 24, 25, 26, 27, 28, 29]),
# arr...
What is a monad?
...unctions (that is, functions which can take other functions as arguments).
Arrays in JavaScript support the pattern, so let’s use that as the first example.
The gist of the pattern is we have a type (Array in this case) which has a method which takes a function as argument. The operation supplied ...