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Why do we need tuples in Python (or any immutable data type)?
.... It so happens that in many people's typical use cases, lists tend to be array-like and tuples tend to be record-like. But this shouldn't stop people from using lists for heterogeneous data if it suits their problem better. As the Zen of Python says: Practicality beats purity.
...
How to get all options of a select using jQuery?
...use we are returning them inside of the map function it actually builds an array of the values just as requested.
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JavaScript variable assignments from tuples
...
A frozen array behaves identically to a python tuple:
const tuple = Object.freeze(["Bob", 24]);
let [name, age]; = tuple
console.debug(name); // "Bob"
console.debug(age); // 24
Be fancy and define a class
class Tuple extends Array...
Can You Get A Users Local LAN IP Address Via JavaScript?
...eaned up the function that they found. This will either return false or an array. When testing remember that you need to collapse the array in the web developer console otherwise it's nonintuitive default behavior may deceive you in to thinking that it is returning an empty array.
function ip_local...
What does “Mass Assignment” mean in Laravel?
...
Mass assignment is when you send an array to the model creation, basically setting a bunch of fields on the model in a single go, rather than one by one, something like:
$user = new User(request()->all());
(This is instead of explicitly setting each value...
Progress indicator during pandas operations
...pool = multiprocessing.Pool(processes=njobs)
try:
splits = np.array_split(df[subset], njobs)
except ValueError:
splits = np.array_split(df, njobs)
pool_data = [(split_ind, df_split, df_f_name) for split_ind, df_split in enumerate(splits)]
results = pool.map(partial(...
How do I copy a hash in Ruby?
...py works for any object that can be marshalled. Most built-in data types (Array, Hash, String, &c.) can be marshalled.
Marshalling is Ruby's name for serialization. With marshalling, the object--with the objects it refers to--is converted to a series of bytes; those bytes are then used to cre...
PHP file_get_contents() and setting request headers
...t worked for me (Dominic was just one line short).
$url = "";
$options = array(
'http'=>array(
'method'=>"GET",
'header'=>"Accept-language: en\r\n" .
"Cookie: foo=bar\r\n" . // check function.stream-context-create on php.net
"User-Agent: Mozilla/5.0 ...
How do I compare two hashes?
...hash1.to_a == hash3.to_a # => false
You can convert the hashes to arrays, then get their difference:
hash3.to_a - hash1.to_a # => [["c", 3]]
if (hash3.size > hash1.size)
difference = hash3.to_a - hash1.to_a
else
difference = hash1.to_a - hash3.to_a
end
Hash[*difference.flatten] ...
What is the difference between sed and awk? [closed]
...ramming constructs including if/else, while, do/while and for (C-style and array iteration). There is complete support for variables and single-dimension associative arrays plus (IMO) kludgey multi-dimension arrays. Mathematical operations resemble those in C. It has printf and functions. The "K" in...