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How to ignore all hidden directories/files recursively in a git repository?
...only /.gitignore and not every .gitignore file regardless of where it is located? I.e. why not list !.gitignore (no slash)?
– Jason Young
Feb 12 at 16:08
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What does the constant 0.0039215689 represent?
...ess that this was done for performance reasons.
Multiplying by the reciprocal is faster than repeatedly dividing by 255.
Side Note:
If you're wondering why such a micro-optimization isn't left to the compiler, it's because it is an unsafe floating-point optimization. In other words:
x / 255 !...
WPF datagrid empty row at bottom
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Sounds like you probably have CanUserAddRows set to true for the DataGrid. Just add
CanUserAddRows="false"
to the XAML.
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How does bash tab completion work?
...rary, as already mentioned by fixje, manages the command line editing, and calls back to bash when tab is pressed, to enable completion. Bash then gives (see next point) a list of possible completions, and readline inserts as much characters as are identified unambiguously by the characters already ...
What is the purpose of a plus symbol before a variable?
...r returns the numeric representation of the object. So in your particular case, it would appear to be predicating the if on whether or not d is a non-zero number.
Reference here. And, as pointed out in comments, here.
sha...
What's the difference setting Embed Interop Types true and false in Visual Studio?
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Note that there is a rather significant difference that may break existing code when turning Embed Interop Types off. The difference is mentioned here: “C# 4, and later versions, converts the returned Object to dynamic automatically if the assembly is refere...
How to check if a model has a certain column/attribute?
...? attr_name where attr_name is the string name of your attribute.
In this case: Number.column_names.include? 'one'
For an instance
Use record.has_attribute?(:attr_name) or record.has_attribute?('attr_name') (Rails 3.2+) or record.attributes.has_key? attr_name.
In this case: number.has_attribute?...
what's the meaning of '=?' in angularJS directive isolate scope declaration?
...Yes:
The 'isolate' scope takes an object hash which defines a set of local scope properties derived from the parent scope. These local properties are useful for aliasing values for templates. Locals definition is a hash of local scope property to its source:
= or =attr - set up bi-direct...
How can I verify if a Windows Service is running
I have an application in C# (2.0 running on XP embedded) that is communicating with a 'watchdog' that is implemented as a Windows Service. When the device boots, this service typically takes some time to start. I'd like to check, from my code, if the service is running. How can I accomplish this?
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How would you compare jQuery objects?
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Can shorten to: if(this.parentNode === document.body);
– ehynds
Sep 29 '11 at 16:14
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