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Singleton: How should it be used
...t; "hello world\n";
Of course not. We don't need protection against this error, because that kind of error just doesn't happen. If it does, the correct response is to go home and sleep for 12-20 hours and hope you feel better.
If only one object is needed, simply create one instance. If one objec...
Sample random rows in dataframe
...ow make it better by checking first if n<=nrow(df) and stopping with an error.
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Size-limited queue that holds last N elements in Java
...like this (I'm typing directly into this window, so buyer beware of syntax errors):
public LimitedSizeQueue implements Queue
{
private int maxSize;
private LinkedList storageArea;
public LimitedSizeQueue(final int maxSize)
{
this.maxSize = maxSize;
storageArea = new LinkedList();
...
Moving and vanishing lines of code; trouble with Eclipse's XML Editor
...ntally, so if you edit an XML file which has this problem, ADT will add an error marker for this problem -- along with a quickfix to perform surgery on the document to fix it.
In short:
Get ADT 21 Preview 9; run Lint on your projects and look for any complaints about files containing broken line en...
Does python have an equivalent to Java Class.forName()?
...In [59]: raise import_class_from_string('google.appengine.runtime.apiproxy_errors.DeadlineExceededError')()
---------------------------------------------------------------------------
DeadlineExceededError Traceback (most recent call last)
<ipython-input-59-b4e59d809b2f> in...
Android get free size of internal/external memory
...rmatSize(availableBlocks * blockSize);
} else {
return ERROR;
}
}
public static String getTotalExternalMemorySize() {
if (externalMemoryAvailable()) {
File path = Environment.getExternalStorageDirectory();
StatFs stat = new StatFs(...
Check if a variable is of function type
...rence (open your javascript console and reload page, there might be logged error messages). Note: Revision 3 added isFunctionD (based on only typeof == "function") - and it seems to be much faster than Underscore's "fast" version.
– Joel Purra
Feb 2 '12 at 18:3...
How to configure Eclipse build path to use Maven dependencies?
...the maven-eclipse-plugin was the cause of my strange unresolved dependency errors. Thanks!
– vaughan
Jun 27 '11 at 15:22
1
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Why doesn't Ruby support i++ or i-- (increment/decrement operators)?
...n|de)crement" working so
|could somebody help here? Does this contain some errors or is the idea
|wrong?
(1) ++ and -- are NOT reserved operator in Ruby.
(2) C's increment/decrement operators are in fact hidden assignment.
They affect variables, not objects. You cannot accomplish
...
How can I deploy an iPhone application from Xcode to a real iPhone device?
...ject settings from iphoneos to iOS 4.3, things work. Although xcode says 'Error launching remote program: failed to get the task for process' I can launch the app by clicking on it.
– nosatalian
Aug 10 '11 at 5:34
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