The chan-signal crate provides a solution to handle OS signal using channels, altough this crate is experimental and should be used carefully.
Example taken from BurntSushi/chan-signal.
#[macro_use]
extern crate chan;
extern crate chan_signal;
use chan_signal::Signal;
fn main() {
// S...
If you want to change the order of a character strings you can use parentheses in the pattern to group parts of the string together. These groups can in the replacement argument be addresed using consecutive numbers.
The following example shows how you can reorder a vector of names of the form &quo...
You can use method chaining while working with JSONObject and JSONArray.
JSONObject example
JSONObject obj = new JSONObject();//Initialize an empty JSON object
//Before: {}
obj.put("name","Nikita").put("age","30").put("isMarried","true"...
Search for all facts involving a pattern in an hypothesis or conclusion:
Coq < Search (_ + O).
plus_n_O: forall n : nat, n = n + 0
The _ character serves as a wildcard, it can be used multiple times:
Coq < Search (S _ <= _).
le_S_n: forall n m : nat, S n <= S m -> n <= m
le...
You can switch it On at the Module/Class Level by placing the directive at the top of the code file.
Option Strict On
You can switch it on at the project level via the menu in Visual Studio
Project > [Project] Properties > Compile Tab > Option Strict > On
You ...
When your command is made available to your application, you can use Laravel to schedule it to run at pre-defined intervals, just like you would a CRON.
In The app/Console/Kernel.php file you will find a schedule method that you can use to schedule your task.
<?php
namespace App\Console;
...
The scheduler can be run using the command:
php artisan schedule:run
The scheduler needs to be run every minute in order to work correctly. You can set this up by creating a cron job with the following line, which runs the scheduler every minute in the background.
* * * * * php /path/to/artisan...
The easiest method to bypass cache is to change the URL. This is used as a best practice when the URL contains a version or a checksum of the resource, e.g.
http://example.com/image.png?version=1
http://example.com/image.png?version=2
These two URLs will be cached separately, so even if …?versi...
To change the URL of the repository you want your remote to point to, you can use the set-url option, like so:
git remote set-url <remote_name> <remote_repository_url>
Example:
git remote set-url heroku https://git.heroku.com/fictional-remote-repository.git
Launch mode defines the behaviour of new or existing activity in the task.
There are possible launch modes:
standard
singleTop
singleTask
singleInstance
It should be defined in android manifest in <activity/> element as android:launchMode attribute.
<activity
android:launchM...
Get all Google Forms with the word "Untitled" in the file name.
function mainSearchFunction(searchStr) {
var fileInfo,arrayFileIDs,arrayFileNames,arrayOfIndexNumbers,
allFileIDsWithStringInName,i,searchStr,thisID;//Declare variables
if (!searchStr) {
searchStr = &quo...
IPv4
To match IPv4 address format, you need to check for numbers [0-9]{1,3} three times {3} separated by periods \. and ending with another number.
^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$
This regular expression is too simple - if you want to it to be accurate, you need to check that the numbers are be...
A Stopwatch instance can measure elapsed time over several intervals with the total elapsed time being all individual intervals added together. This gives a reliable method of measuring elapsed time between two or more events.
Stopwatch stopWatch = new Stopwatch();
stopWatch.Start();
double d =...
Redux is very functional, so unit testing is very straightforward.
Action creator:
export function showSidebar () {
return {
type: 'SHOW_SIDEBAR'
}
}
Action creators unit test:
import expect from 'expect'
import actions from './actions'
import * as type from './constants'
desc...
We're defining a robust version of a function that reads the HTML code from a given URL. Robust in the sense that we want it to handle situations where something either goes wrong (error) or not quite the way we planned it to (warning). The umbrella term for errors and warnings is condition
Functio...
While server side-code can run with elevated privileges, there is not an equivalent method to elevate privileges in client-side code (for obvious security reasons). As an alternative, you can specify credentials to emulate the access of a specific user or service account.
To specify credentials, bu...
When testing for any of several equality comparisons:
if a == 3 or b == 3 or c == 3:
it is tempting to abbreviate this to
if a or b or c == 3: # Wrong
This is wrong; the or operator has lower precedence than ==, so the expression will be evaluated as if (a) or (b) or (c == 3):. The correct w...
Structure for Binary Search Tree (BST) nodes:
struct node {
int data;
node * left;
node * right;
}
Search Algorithm
// Check if a value exists in the tree
bool BSTSearch(node * current, int value)
{
if (current->data == value)
{
return true;
}
e...
