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How to delete an item in a list if it exists?
... in iterable if item] if the first argument is None); in Python 3.x, it is now equivalent to (item for item in iterable if function(item)). The subtle difference is that filter used to return a list, now it works like a generator expression - this is OK if you are only iterating over the cleaned lis...
What's the difference between tag and release?
...email to support@github.com or this contact form.
Update:
The GitHub API now allows to manipulate Releases. See the announcement.
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Providing a default value for an Optional in Swift?
...
Update
Apple has now added a coalescing operator:
var unwrappedValue = optionalValue ?? defaultValue
The ternary operator is your friend in this case
var unwrappedValue = optionalValue ? optionalValue! : defaultValue
You could also pr...
Optimal number of threads per core
...
I know this question is rather old, but things have evolved since 2009.
There are two things to take into account now: the number of cores, and the number of threads that can run within each core.
With Intel processors, the nu...
Which equals operator (== vs ===) should be used in JavaScript comparisons?
...same and when they are of the same length (as explained in the third rule)
Now it becomes interesting:
var a = "12" + "3";
var b = "123";
alert(a === b); // returns true, because strings behave like value types
But how about this?:
var a = new String("123");
var b = "123";
alert(a === b); // retu...
Unrecognized attribute 'targetFramework'. Note that attribute names are case-sensitive
...Panel open IIS manager -> on Left side select "Application Pools" -> Now on middle part your project listing display then select your project e.g. "MvcApplication1" -> from right side select "set Application Pool Defaults" -> Now change .Net Framework Version from V2.0 to V4.0
This one...
How do I address unchecked cast warnings?
...eally should have the generic parameters <String, String>. You must know beforehand what the parameters should be (or you'll find out when you get a ClassCastException). This is why the code generates a warning, because the compiler can't possibly know whether is safe.
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Go build: “Cannot find package” (even though GOPATH is set)
...o a subfolder of $GOPATH/src, e.g. $GOPATH/src/test
go install test should now create an executable in $GOPATH/bin that can be called by typing test into your terminal.
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How to export a Vagrant virtual machine to transfer it
...Machine** >> **Add**
4.) Run `vagrant box list` to see if vagrant acknowledges your machines.
5.) `git clone my_project`
6.) `vagrant up`
I had a few problems with VB Guest additions.
I fixed them with this solution.
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Controlling a USB power supply (on/off) with Linux
... USB power management from kernels 2.6.32, which seem to settle in 2.6.38. Now you'll need to wait for the device to become idle, which is governed by the particular device driver. The driver needs to support it, otherwise the device will never reach this state. Unluckily, now the user has no chance...