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When I catch an exception, how do I get the type, file, and line number?
...
Source (Py v2.7.3) for traceback.format_exception() and called/related functions helps greatly. Embarrassingly, I always forget to Read the Source. I only did so for this after searching for similar details in vain. A simple question,...
How to optimize for-comprehensions and loops in Scala?
...ll" in a concise manner. I failed miserably and came up with
object P005_V2 extends App {
def isDivis(x:Int):Boolean = {
var i = 1
while(i <= 20) {
if (x % i != 0) return false
i += 1
}
return true
}
def find(n:Int):Int = if (isDivis(n)) n else find (n+2)
pri...
App Inventor 2 扩展 · App Inventor 2 中文网
...t in an app. Open your browser to an App Inventor server. You could use ai2.appinventor.mit.edu, or you could use a server you’ve built on your local machine.
Start a new project. In the designer palette open the Extension drawer and click import extension. Choose the aix file you built just...
Difference between method and function in Scala
...bstract method (it has a few concrete methods as well):
def apply(v1: T1, v2: T2): R
And that tell us all that there is to know about it. A function has an apply method which receives N parameters of types T1, T2, ..., TN, and returns something of type R. It is contra-variant on the parameters it...
How to configure an existing git repo to be shared by a UNIX group
...ch with a -f flag to your push command.
(from http://git-scm.com/book/en/v2/Customizing-Git-Git-Configuration)
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PowerShell: Store Entire Text File Contents in Variable
...backslash) in PowerShell V3. Further, at the time of my answer I was using V2, so perhaps there is something else causing an issue in your environment.
– Michael Sorens
May 9 '13 at 14:35
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What's the point of the X-Requested-With header?
...se as response.
Most Ajax libraries (Prototype, JQuery, and Dojo as of v2.1) include an X-Requested-With header that indicates that the request was made by XMLHttpRequest instead of being triggered by clicking a regular hyperlink or form submit button.
Source: http://grails-plugins.github.io/g...
Why do you need to create a cursor when querying a sqlite database?
...e nonstandard, i.e. they are not part of Python Database API Specification v2.0 (PEP 249).
As long as you use the standard methods of the Cursor object, you can be sure that if you switch to another database implementation that follows the above specification, your code will be fully portable. Perh...
What's the difference between HEAD, working tree and index, in Git?
...gs are fixed references that mark a specific point in history, for example v2.6.29.
On the contrary, heads are always moved to reflect the current position of project development.
(note: as commented by Timo Huovinen, those arrows are not what the commits point to, it's the workflow order, bas...
Why are C# interface methods not declared abstract or virtual?
...r CS0106: The modifier 'virtual' is not valid for this item". Tested using v2.0.50727 (oldest version on my PC).
– ccppjava
Aug 22 '13 at 10:01
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