It is unlikely that someone uses an unsupported version of Django, and at his own risks. If ever someone does, it must be his concern to know if a feature exists in the given version.
Considering the above, it is useless to mention specificities of an unsupported version.
1.6
This kind of block i...
5.6
PHP 5.6 introduced variable-length argument lists (a.k.a. varargs, variadic arguments), using the ... token before the argument name to indicate that the parameter is variadic, i.e. it is an array including all supplied parameters from that one onward.
function variadic_func($nonVariadic, ...$...
You can store the signing information setting environment variables.
These values can be accessed with System.getenv("<VAR-NAME>")
In your build.gradle you can define:
signingConfigs {
release {
storeFile file(System.getenv("KEYSTORE"))
storePasswo...
Inserting elements is simple:
> let m = Map.singleton "Alex" 31
fromList [("Alex",31)]
> Map.insert "Bob" 99 m
fromList [("Alex",31),("Bob",99)]
You define a keyword argument in a method by specifying the name in the method definition:
def say(message: "Hello World")
puts message
end
say
# => "Hello World"
say message: "Today is Monday"
# => "Today is Monday"
You can define multip...
2.1
Required keyword arguments were introduced in Ruby 2.1, as an improvement to keyword arguments.
To define a keyword argument as required, simply declare the argument without a default value.
def say(message:)
puts message
end
say
# => ArgumentError: missing keyword: message
say ...
You can define a method to accept an arbitrary number of keyword arguments using the double splat (**) operator:
def say(**args)
puts args
end
say foo: "1", bar: "2"
# {:foo=>"1", :bar=>"2"}
The arguments are captured in a Hash. You can manip...
SQLite has no separate data type for date or time values.
ISO8601 strings
The built-in keywords CURRENT_DATE, CURRENT_TIME, and CURRENT_TIMESTAMP return strings in ISO8601 format:
> SELECT CURRENT_DATE, CURRENT_TIME, CURRENT_TIMESTAMP;
CURRENT_DATE CURRENT_TIME CURRENT_TIMESTAMP
--------...
Unlike a parallel for-loop (parfor), which takes the iterations of a loop and distributes them among multiple threads, a single program, multiple data (spmd) statement takes a series of commands and distributes them to all the threads, so that each thread performs the command and stores the results....
You can use the archivesBaseName to set the name of apk.
For example:
defaultConfig {
....
project.ext.set("archivesBaseName", "MyName-" + defaultConfig.versionName);
}
You will obtain this output.
MyName-X.X.X-release.apk
To remove an element from a map use the .delete() method.
map.delete(key);
Example:
const map = new Map([[1, 2], [3, 4]]);
console.log(map.get(3)); // 4
map.delete(3);
console.log(map.get(3)); // undefined
This method returns true if the element existed and has been removed, otherwise fal...
Use .get(key) to get value by key and .set(key, value) to assign a value to a key.
If the element with the specified key doesn't exist in the map, .get() returns undefined.
.set() method returns the map object, so you can chain .set() calls.
const map = new Map();
console.log(map.get(1)); // und...
Using requestAnimationFrame may on some systems update at more frames per second than the 60fps. 60fps is the default rate if the rendering can keep up. Some systems will run at 120fps maybe more.
If you use the following method you should only use frame rates that are integer divisions of 60 so th...
Building project dependencies can sometimes be a tedious task. Instead of publishing a package version to NPM and installing the dependency to test the changes, use npm link. npm link creates a symlink so the latest code can be tested in a local environment. This makes testing global tools and proje...
To locate comments in BeautifulSoup, use the text (or string in the recent versions) argument checking the type to be Comment:
from bs4 import BeautifulSoup
from bs4 import Comment
data = """
<html>
<body>
<div>
<!-- desired text -->...
The %timeit magic runs the given code many times, then returns the speed of the fastest result.
In [1]: %timeit sum(range(100000))
100 loops, best of 3: 2.91 ms per loop
The %%timeit cell magic can be used to time blocks of code.
In [2]: %%timeit
...: a = 0
...: for i in range(100000):...
This example is about replacing a List element while ensuring that the replacement element is at the same position as the element that is replaced.
This can be done using these methods:
set(int index, T type)
int indexOf(T type)
Consider an ArrayList containing the elements "Program sta...
There are two basic classes of exact numeric data types - Integer, and Fixed Precision and Scale.
Integer Data Types
bit
tinyint
smallint
int
bigint
Integers are numeric values that never contain a fractional portion, and always use a fixed amount of storage. The range and storage sizes o...
