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How to access array elements in a Django template?
... # method call
foo[bar] # list-index lookup
It tries them in this order until it finds a match. So foo.3 will get you your list index because your object isn't a dict with 3 as a key, doesn't have an attribute named 3, and doesn't have a method named 3.
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How to check if an object is a list or tuple (but not string)?
This is what I normally do in order to ascertain that the input is a list / tuple - but not a str . Because many times I stumbled upon bugs where a function passes a str object by mistake, and the target function does for x in lst assuming that lst is actually a list or tuple .
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Why are joins bad when considering scalability?
...spreading out, or paring down the repeated work to the bare essentials, in order to minimize resource use per work unit. To scale well, you don't do anything you don't need to in volume, and the things you actually do you make sure are done as efficiently as possible.
In that context, of course join...
Is there any reason to use a synchronous XMLHttpRequest?
... This suits the majority of development needs where the desire is to have ordered, non-blocking events that enable the browsers to retain responsiveness for the user (good UX).
As stated in the Mozilla docs there are cases where you have to use synchronous requests; however, also listed is a workar...
Proper Repository Pattern Design in PHP?
...nterface. This will define the "contract" that repositories must follow in order to be used by my controller. Remember, my controller will not know where the data is actually stored.
Note that my repositories will only every contain these three methods. The save() method is responsible for both cre...
Get name of current script in Python
...lation functions, such as os.path.abspath(...) or os.path.realpath(...) in order to extract the full or real path.
However, these methods rely on the current path in order to derive the full path. Thus, if a program first changes the current working directory, for example via os.chdir(...), and only...
How to store arrays in MySQL?
...the key.". An array does too much. It has multiple facts and it stores the order (which is not related to the relation itself). And the performance is poor (see above).
Imagine that you have a person table and you have a table with phone calls by people. Now you could make each person row have a li...
Event system in Python
...s
As of June 2020, these are the event-related packages available on PyPI,
ordered by most recent release date.
RxPy3 1.0.1: June 2020
pluggy 0.13.1: June 2020 (beta)
Louie 2.0: Sept 2019
python-dispatch 0.1.2: Feb 2019
PyPubSub 4.0.3: Jan 2019
zope.event 4.4: 2018
pyeventdispatcher 0.2.3a0: 2018
b...
How can I connect to a Tor hidden service using cURL in PHP?
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One Activity and all other Fragments [closed]
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Pros
The main activity is 700 lines of code, just nicely managing the order of the fragments navigation.
Each fragment is nicely separated into it's own class, and is relatively small (~couple hundred lines of ui stuff).
Management can say, "hey, how about we switch the order of those screens",...