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Declaration/definition of variables locations in ObjectiveC?
Ever since starting to work on iOS apps and objective C I've been really puzzled by the different locations where one could be declaring and defining variables. On one hand we have the traditional C approach, on the other we have the new ObjectiveC directives that add OO on top of that. Could you fo...
Samples of Scala and Java code where Scala code looks simpler/has fewer lines?
...de which show that Scala code is more simple and concise then code written in Java (of course both samples should solve the same problem).
...
dplyr summarise: Equivalent of “.drop=FALSE” to keep groups with zero length in output
When using summarise with plyr 's ddply function, empty categories are dropped by default. You can change this behavior by adding .drop = FALSE . However, this doesn't work when using summarise with dplyr . Is there another way to keep empty categories in the result?
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Handling optional parameters in javascript
... 2) { // if only two arguments were supplied
if (Object.prototype.toString.call(parameters) == "[object Function]") {
callback = parameters;
}
}
//...
}
You can also use the arguments object in this way:
function getData (/*id, parameters, callback*/) {
var id = arguments[0],...
How do you UrlEncode without using System.Web?
I am trying to write a windows client application that calls a web site for data. To keep the install to a minimum I am trying only use dlls in the .NET Framework Client Profile . Trouble is that I need to UrlEncode some parameters, is there an easy way to do this without importing System.Web.dll w...
Likelihood of collision using most significant bits of a UUID in Java
If I'm using Long uuid = UUID.randomUUID().getMostSignificantBits() how likely is it to get a collision. It cuts off the least significant bits, so there is a possibility that you run into a collision, right?
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Any way to force strict mode in node?
Could not find this answer anywhere, but I did find several mailing lists where this was discussed, these are rather old however and I have no idea if this is implemented or not.
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Java: method to get position of a match in a String?
...
The family of methods that does this are:
int indexOf(String str)
indexOf(String str, int fromIndex)
int lastIndexOf(String str)
lastIndexOf(String str, int fromIndex)
Returns the index within this string of the first (or last) occurrence of the specified ...
URL Encoding using C#
...ation which sends a POST request to the VB forum software and logs someone in (without setting cookies or anything).
13 Ans...
What is android:weightSum in android, and how does it work?
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Per documentation, android:weightSum defines the maximum weight sum, and is calculated as the sum of the layout_weight of all the children if not specified explicitly.
Let's consider an example with a LinearLayout with horizontal orientation and 3 ImageViews insid...