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What's the best way of implementing a thread-safe Dictionary?
I was able to implement a thread-safe Dictionary in C# by deriving from IDictionary and defining a private SyncRoot object:
...
How to detect if a function is called as constructor?
... a new instance of* x when calling x as a constructor is indistinguishable from a pre-existing instance of x passed as this when calling x as a function, unless you assign a property to every new object created by x as it is constructed:
function x(y) {
var isConstructor = false;
if (this i...
How to cast an Object to an int
...that this object is an Integer :
int i = (Integer) object;
Or, starting from Java 7, you can equivalently write:
int i = (int) object;
Beware, it can throw a ClassCastException if your object isn't an Integer and a NullPointerException if your object is null.
This way you assume that your Obj...
In R, how to get an object's name after it is sent to a function?
...ll not succeed inside a local function when a set of list items are passed from the first argument to lapply (and it also fails when an object is passed from a list given to a for-loop.) You would be able to extract the ".Names"-attribute and the order of processing from the structure result, if it ...
Twitter's typeahead.js suggestions are not styled (have no border, transparent background, etc.)
...o the theme of
your web page.
My solution was thus to copy the styling from the example I wished to replicate:
.tt-query, /* UPDATE: newer versions use tt-input instead of tt-query */
.tt-hint {
width: 396px;
height: 30px;
padding: 8px 12px;
font-size: 24px;
line-height: 30p...
What is more efficient: Dictionary TryGetValue or ContainsKey+Item?
From MSDN's entry on Dictionary.TryGetValue Method :
10 Answers
10
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Does Swift support reflection?
...uit())[0].0 // "name"
reflect(Fruit())[0].1.summary // "Apple"
From mchambers gist, here:
https://gist.github.com/mchambers/fb9da554898dae3e54f2
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When to use symbols instead of strings in Ruby?
... saving memory. So every time the interpreter reads :my_key it can take it from memory instead of instantiate it again. This is less expensive than initializing a new string every time.
You can get a list all symbols that are already instantiated with the command Symbol.all_symbols:
symbols_count...
How to get div height to auto-adjust to background size?
...tly do you mean? Once the image has downloaded, it is presumably cached. From that point, any other requests are based on a local copy. So, no. It is not downloaded twice. But, it is loaded twice.
– Tmac
Oct 22 '15 at 2:34
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No @XmlRootElement generated by JAXB
I'm trying to generate Java classes from the FpML (Finanial Products Markup Language) version 4.5. A ton of code is generated, but I cannot use it. Trying to serialize a simple document I get this:
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