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Most efficient conversion of ResultSet to JSON?
The following code converts a ResultSet to a JSON string using JSONArray and JSONObject .
14 Answers
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How to check for null in Twig?
... other value that evaluates to false (such as zero, empty string and empty array). Besides, it will cause an error if var is not defined. A safer way would be:
{% if var is not defined or var is null %}
which can be shortened to:
{% if var|default is null %}
If you don't provide an argument to...
When should you use constexpr capability in C++11?
...stexpr would be beneficial here.
Another example: you want to declare a C-array (or a std::array) that is as big as another array. The way to do this at the moment is like so:
int x[10];
int y[sizeof x / sizeof x[0]];
But wouldn’t it be better to be able to write:
int y[size_of(x)];
Thanks ...
Getting the index of the returned max or min item using max()/min() on a list
... below) than a solution using itemgetter().
If you are dealing with numpy arrays or can afford numpy as a dependency, consider also using
import numpy as np
index_min = np.argmin(values)
This will be faster than the first solution even if you apply it to a pure Python list if:
it is larger tha...
Allowed memory size of 33554432 bytes exhausted (tried to allocate 43148176 bytes) in php
...loop that has run out of control and you are creating objects or adding to arrays on each pass of the loop.
Check for infinite loops.
If that isn't the problem, try and help out PHP by destroying objects that you are finished with by setting them to null. eg. $OldVar = null;
Check the code where...
How do I sort a Set to a List in Java?
...e best. It is inefficient, as it creates a new List and an unnecessary new array. Also, it raises "unchecked" warnings because of the type safety issues around generic arrays.
Instead, use something like this:
public static
<T extends Comparable<? super T>> List<T> asSortedList(...
Is there any standard for JSON API response format?
... error. If the service returns multiple errors, each element in the errors array represents a different error." Perhaps the top level error would mention "Request failed input validation" and the errors[] array would have one entry for each specific validation failure that occurred.
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How do you access the matched groups in a JavaScript regular expression?
...rge strings. But if you need, the result can be easily transformed into an Array by using the spread syntax or the Array.from method:
function getFirstGroup(regexp, str) {
const array = [...str.matchAll(regexp)];
return array.map(m => m[1]);
}
// or:
function getFirstGroup(regexp, str) {
...
Reading a delimited string into an array in Bash
...
In order to convert a string into an array, please use
arr=($line)
or
read -a arr <<< $line
It is crucial not to use quotes since this does the trick.
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What exactly does the .join() method do?
...ist ["5", "9", "5"].
It appears that you're looking for + instead:
print array.array('c', random.sample(string.ascii_letters, 20 - len(strid)))
.tostring() + strid
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