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Find document with array that contains a specific value
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@AeroWang use this db.person.find( { favouriteFoods: { $all: ["sushi", "sashimi"] } } ) will return all person loving both "sushi" and "sashimi" someone pointed it a few answers below
– benraay
Jul 1 at 14:20
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Meaning of $? (dollar question mark) in shell scripts
.../drush status bootstrap | grep -q $(vendor/bin/drush php-eval 'if (function_exists("t")) echo t("Successful");') &> /dev/null;. If I had to put that in a single line if [ ... ] it would be terribly unreadable. I plan to store the output of that line to a variable so I can just say if [ $drupa...
How does the keyword “use” work in PHP and can I import classes with it?
...ou want to access those class objects then you can do the following:
$smtp_mailer = new SMTPMailer;
$mailgun_mailer = new MailgunMailer;
It will reference the original class.
Some may get confused that then of there are not Similar class names then there is no use of use keyword. Well, you can u...
Struggling with NSNumberFormatter in Swift for currency
...string(from: price) // "$123.44"
formatter.locale = Locale(identifier: "es_CL")
formatter.string(from: price) // $123"
formatter.locale = Locale(identifier: "es_ES")
formatter.string(from: price) // "123,44 €"
Here's the old example on how to use it on Swift 2.
let price = 123.436
let form...
How to know what the 'errno' means?
When calling execl(...) , I get an errno=2 . What does it mean? How can I know the meaning of this errno ?
15 Answers
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Pass correct “this” context to setTimeout callback?
...erscore.js, lodash
It's available in Underscore.js, as well as lodash, as _.bind(...)1,2
bind Bind a function to an object, meaning that whenever the function is called, the value of this will be the object. Optionally, bind arguments to the function to pre-fill them, also known as partial appl...
What is the difference between 'typedef' and 'using' in C++11?
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All standard references below refers to N4659: March 2017 post-Kona working draft/C++17 DIS.
Typedef declarations can, whereas alias declarations cannot, be used as initialization statements
But, with the first two non-temp...
Binding to static property
... binding updates.
public class VersionManager
{
private static String _filterString;
/// <summary>
/// A static property which you'd like to bind to
/// </summary>
public static String FilterString
{
get
{
return _filterString...
Using isKindOfClass with Swift
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Another approach using the new Swift 2 syntax is to use guard and nest it all in one conditional.
guard let touch = object.AnyObject() as? UITouch, let picker = touch.view as? UIPickerView else {
return //Do Nothing
}
//Do something with picker
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Instance v state variables in react.js
...nter: function () {
// Open a new one after a delay
this._timeout = setTimeout(function () {
this.openWidget();
}.bind(this), DELAY);
},
handleLeave: function () {
// Clear the timeout for opening the widget
clearTimeout(this._timeout...