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How do I check if a variable exists in a list in BASH
...er to use a "is in" function isIn() so you can write the item first in parameters. Also you can echo something instead of using exit like this : [[ $2 =~ (^|[[:space:]])$1($|[[:space:]]) ]] && echo 1 || echo 0 So you can use the function this way : result=$(isIn "-t" "-o -t 45") && e...
Fatal error: use of unimplemented initializer 'init(coder:)' for class
...alizer init?(coder aDecoder: NSCoder) on the target UIViewController. That method is required because instantiating a UIViewController from a UIStoryboard calls it.
To see how we initialize a UIViewController from a UIStoryboard, please take a look here
Why is this not a problem with Objective-C?
Be...
Language Books/Tutorials for popular languages
...d books/tutorials on languages I wanted to learn. Even still, there are times I need to pick up a language relatively quickly for a new project I am working on. The point of this post is to document some of the best tutorials and books for these languages. I will start the list with the best I ca...
How do I subtract minutes from a date in javascript?
...e this pseudo code into working js [don't worry about where the end date comes from except that it's a valid javascript date].
...
Read and parse a Json File in C#
...ss Item
{
public int millis;
public string stamp;
public DateTime datetime;
public string light;
public float temp;
public float vcc;
}
You can even get the values dynamically without declaring Item class.
dynamic array = JsonConvert.DeserializeObject(json);
foreach(var it...
Xcode build failure “Undefined symbols for architecture x86_64”
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It looks like you are missing including the IOBluetooth.framework in your project. You can add it by:
-Clicking on your project in the upper left of the left pane (the blue icon).
-In the middle pane, click on the Build Phases tab.
-Under "Link Binary With Libraries", click on ...
How to grep and replace
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On OS X 10.10 Terminal, a proper extension string to parameter -i is required. For example, find /path/to/files -type f -exec sed -i "" "s/oldstring/new string/g" {} \; Anyway, providing empty string still creates a backup file unlike described in manual...
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Best way to stress test a website [duplicate]
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My suggestion is for you to do some automated tests first. Use selenium for it.
Then deploy selenium grid to test in multiple computers at the same time.
Although Selenium as an automated test tool will run quite fast, making a mini stress test. If you put...
What exactly does @synthesize do?
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In your example, mapView1 is an instance variable (ivar), a piece of memory storage that belongs to an instance of the class defined in example.h and example.m. mapView is the name of a property. Properties are attributes of an object that can be read or set using the dot notation: myObject.ma...
Best way to give a variable a default value (simulate Perl ||, ||= )
.... It is called the Null coalescing operator. You can use it like this:
$name = $_GET['name'] ?? 'john doe';
This is equivalent to
$name = isset($_GET['name']) ? $_GET['name']:'john doe';
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