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Using the Swift if let with logical AND operator &&
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As of Swift 1.2, this is now possible. The Swift 1.2 and Xcode 6.3 beta release notes state:
More powerful optional unwrapping with if let — The if let construct
can now unwrap multiple optionals at once, as well as include
intervening boolean conditions. This lets you express co...
Shell equality operators (=, ==, -eq)
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answered Dec 8 '13 at 3:31
John KugelmanJohn Kugelman
292k6262 gold badges455455 silver badges506506 bronze badges
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Mongoimport of json file
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309
I was able to fix the error using the following query:
mongoimport --db dbName --collection c...
Max parallel http connections in a browser?
...multaneous persistent connections per server/proxy:
Firefox 2: 2
Firefox 3+: 6
Opera 9.26: 4
Opera 12: 6
Safari 3: 4
Safari 5: 6
IE 7: 2
IE 8: 6
IE 10: 8
Chrome: 6
The limit is per-server/proxy, so your wildcard scheme will work.
FYI: this is specifically related to H...
Underscore prefix for property and method names in JavaScript
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35
Welcome to 2019!
It appears a proposal to extend class syntax to allow for # prefixed variable...
Getting exact error type in from DbValidationException
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378
While you are in debug mode within the catch {...} block open up the "QuickWatch" window (ctrl...
Create a custom callback in JavaScript
... but using our own instance as the context
callback.apply(this, ['Hi', 3, 2, 1]);
}
function foo(salutation, three, two, one) {
alert(salutation + " " + this.name + " - " + three + " " + two + " " + one);
}
var t = new Thing('Joe');
t.doSomething(foo); // Alerts "Hi Joe - 3 2 1" via `foo`...
How can I get zoom functionality for images?
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13 Answers
13
Active
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Is there documentation for the Rails column types?
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398
Guidelines built from personal experience:
String:
Limited to 255 characters (depending on...