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What are good uses for Python3's “Function Annotations”
...
How is this better than a docstring for documentation, or explicit type checking in the function? This seems to complicate the language for no reason.
– endolith
Apr 23 '13 at 20:34
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Label encoding across multiple columns in scikit-learn
...ing to use scikit-learn's LabelEncoder to encode a pandas DataFrame of string labels. As the dataframe has many (50+) columns, I want to avoid creating a LabelEncoder object for each column; I'd rather just have one big LabelEncoder objects that works across all my columns of data.
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Using semicolon (;) vs plus (+) with exec in find
...s to the command until
an argument consisting of ';' is encountered. The string '{}'
is replaced by the current file name being processed everywhere
it occurs in the arguments to the command, not just in arguments
where it is alone, as in some versions of find. Both of these
constructions ...
How to create duplicate allowed attributes
...s even possible to have the MyCustomAttribute constructor take an array of strings, a string[], with or without the params modifier. Then it could be applied with the syntax [MyCustom("CONTROL", "ALT", "SHIFT", "D")] (with params).
– Jeppe Stig Nielsen
Oct 13 '...
Which is better, return value or out parameter?
...es also prevent method chaining like this:
Console.WriteLine(GetValue().ToString("g"));
(Indeed, that's one of the problems with property setters as well, and it's why the builder pattern uses methods which return the builder, e.g. myStringBuilder.Append(xxx).Append(yyy).)
Additionally, out para...
Static Classes In Java
...from above:
public class TestMyStaticClass {
public static void main(String []args){
MyStaticClass.setMyStaticMember(5);
System.out.println("Static value: " + MyStaticClass.getMyStaticMember());
System.out.println("Value squared: " + MyStaticClass.squareMyStaticMember()...
How does Google's Page Speed lossless image compression work?
...ls > Batch Rename (or Control Shift R)
In the Preset field select "String Substitution". The New Filenames fields should now display “String Substitution”, followed by "Original Filename"
Enable the checkbox called “Use Regular Expression”
In the “Find” field, enter the Regular E...
How to check whether an array is empty using PHP?
...t empty values before checking (generally done to prevent explodeing weird strings):
foreach ($playerlist as $key => $value) {
if (empty($value)) {
unset($playerlist[$key]);
}
}
if (empty($playerlist)) {
//empty array
}
...
How to make Sequelize use singular table names
...e: true:
var Project = sequelize.define('Project', {
title: Sequelize.STRING,
description: Sequelize.TEXT
})
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Difference between val() and text()
...rText (not HTML) of all the matched elements:
.text()
The result is a string that contains
the combined text contents of all
matched elements. This method works on
both HTML and XML documents. Cannot be
used on input elements. For input
field text use the val attribute.
.val()
G...