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What is the overhead of creating a new HttpClient per call in a WebAPI client?
What should be the HttpClient lifetime of a WebAPI client?
Is it better to have one instance of the HttpClient for multiple calls?
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Applications are expected to have a root view controller at the end of application launch
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community wiki
sho
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What is “callback hell” and how and why does RX solve it?
Can someone give a clear definition together with a simple example that explains what is a "callback hell" for someone who does not know JavaScript and node.js ?
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Convert a Python list with strings all to lowercase or uppercase
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It can be done with list comprehensions. These basically take the form of [function-of-item for item in some-list]. For example, to create a new list where all the items are lower-cased (or upper-cased in the second snippet),...
Cache an HTTP 'Get' service response in AngularJS?
...to create a custom AngularJS service that makes an HTTP 'Get' request when its data object is empty and populates the data object on success.
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Python debugging tips [closed]
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PDB
You can use the pdb module, insert pdb.set_trace() anywhere and it will function as a breakpoint.
>>> import pdb
>>> a="a string"
>>> pdb.set_trace()
--Return--
> <stdin>(1)<module>()->None
(Pdb) p a
'a string'
(Pdb)
To continue execution us...
ResourceDictionary in a separate assembly
...parate applications. I could add them to the applications' assemblies, but it's better if I compile these resources in one single assembly and have my applications reference it, right?
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JQuery - $ is not defined
...You have a botched version of jQuery. This could happen because someone edited the core file, or a plugin may have overwritten the $ variable.
You have JavaScript running before the page is fully loaded, and as such, before jQuery is fully loaded.
First of all, ensure, what script is call properl...
Parse JSON in JavaScript? [duplicate]
... to parse JSON in JavaScript is JSON.parse()
The JSON API was introduced with ES5 (2011) and has since been implemented in >99% of browsers by market share, and Node.js. Its usage is simple:
const json = '{ "fruit": "pineapple", "fingers": 10 }';
const obj = JSON.parse(json);
console.log(obj.fr...
Convert a series of parent-child relationships into a hierarchical tree?
...d/parent pairs to a tree structure and another recursive function to print it out. Only one function would suffice but here's two for clarity (a combined function can be found at the end of this answer).
First initialize the array of child/parent pairs:
$tree = array(
'H' => 'G',
'F' =&...