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data.table vs dplyr: can one do something well the other can't or does poorly?
...is desirable to not modify the input data.table within a function, one can then do:
foo <- function(DT) {
DT = shallow(DT) ## shallow copy DT
DT[, newcol := 1L] ## does not affect the original DT
DT[x > 2L, newcol := 2L] ## no need to copy (internally), as this c...
How to find time complexity of an algorithm
...e instructions it will execute as a function of the size of its input, and then simplify the expression to the largest (when N is very large) term and can include any simplifying constant factor.
For example, lets see how we simplify 2N + 2 machine instructions to describe this as just O(N).
Why ...
Why can I use a function before it's defined in JavaScript?
...ot happening here. We must always define the expression function first and then invoke it.
let lastName = function (family) {
console.log("My last name is " + family);
};
let x = lastName("Lopez");
This is how you can write it in ECMAScript 6:
lastName = (family) => console.log("My last nam...
How to pass a variable from Activity to Fragment, and pass it back?
... args.putInt("index", index);
f.setArguments(args);
return f;
}
Then inside the fragment on the method onCreate or onCreateView you can retrieve the arguments like this:
Bundle args = getArguments();
int index = args.getInt("index", 0);
If you want now communicate from your fragment wi...
What is the difference between JSON and Object Literal Notation?
...ther syntax).
The values can be any valid JavaScript expression, including function definitions and undefined.
Duplicate keys produce defined, specified results (in loose mode, the latter definition replaces the former; in strict mode, it's an error).
Knowing that, just by looking at the syntax,...
Pass Multiple Parameters to jQuery ajax call
... To debug, first look at FireBug what's the exact response of the server, then put a break point in the web service method and see if it is reached.
– Darin Dimitrov
Dec 16 '09 at 18:08
...
Writing/outputting HTML strings unescaped
...e this in your controller:
ViewBag.Stuff = "<li>Menu</li>"
// Then you can do this in your view:
@MvcHtmlString.Create(ViewBag.Stuff)
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WCF chokes on properties with no “set ”. Any workaround?
...
If it's a viable option, then instead of having ErrorBase as the base class, define it as follows:
public interface IError
{
string Message
{
[OperationContract]
get;
// leave unattributed...
How to decide when to use Node.js?
... @nane Yes I do think they can address that issue, however you must then limit yourself to using only libraries written in typesafe languages, or accept that not all of your codebase is statically typed. But one argument goes: since you should write good tests for your code regardless of the ...
Getting “A potentially dangerous Request.Path value was detected from the client (&)”
...scaped and included with the output it will be fine. If it isn't escaped, then you might open yourself up to an attack.
– Justin Helgerson
Jun 3 '13 at 13:52
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