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What is the correct way to represent null XML elements?
....org/TR/REC-xml/#sec-starttags
says that this are the recomended forms.
<test></test>
<test/>
The attribute mentioned in the other answer is validation mechanism and not a representation of state. Please refer to the http://www.w3.org/TR/xmlschema-1/#xsi_nil
XML Schema: Str...
WebDriver: check if an element exists? [duplicate]
...
You could alternatively do:
driver.findElements( By.id("...") ).size() != 0
Which saves the nasty try/catch
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How to copy file from HDFS to the local file system
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In Hadoop 2.0,
hdfs dfs -copyToLocal <hdfs_input_file_path> <output_path>
where,
hdfs_input_file_path maybe obtained from http://<<name_node_ip>>:50070/explorer.html
output_path is the local path of the file, where the file is to be co...
Accessing localhost:port from Android emulator
...ocalhost and from your Android app you can access it via "http://10.0.2.2:<hostport>".
If your emulator must access the internet through a proxy server, you can configure a custom HTTP proxy from the emulator's Extended controls screen. With the emulator open, click More , and then click Sett...
How to count lines in a document?
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Use wc:
wc -l <filename>
This will output the number of lines in <filename>:
$ wc -l /dir/file.txt
3272485 /dir/file.txt
Or, to omit the <filename> from the result use wc -l < <filename>:
$ wc -l < /dir/f...
C# generic “where constraint” with “any generic type” definition?
...to IGarrage representing the T which should be passed into the IGenericCar<T> constraint:
interface IGarrage<TCar,TOther> where TCar : IGenericCar<TOther> { ... }
Option2: Define a base interface for IGenericCar<T> which is not generic and constrain against that interface
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Swift Beta performance: sorting arrays
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tl;dr Swift 1.0 is now as fast as C by this benchmark using the default release optimisation level [-O].
Here is an in-place quicksort in Swift Beta:
func quicksort_swift(inout a:CInt[], start:Int, end:Int) {
if (end - start < 2){
return
}
var p = a[start + (end - st...
Why can't the C# constructor infer type?
...piler fails to make all sorts of possible inferences. For example, class B<T> { public virtual void M<U>() where U : T {} } class D : B<int> { public override void M<U>() {} } ... (new D()).M(); -- you and I can use our mental type inference to know for darn sure that the onl...
How to combine multiple conditions to subset a data-frame using “OR”?
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my.data.frame <- subset(data , V1 > 2 | V2 < 4)
An alternative solution that mimics the behavior of this function and would be more appropriate for inclusion within a function body:
new.data <- data[ which( data$V1 > 2 | d...
Programmatically Lighten or Darken a hex color (or rgb, and blend colors)
...s NOT convert to HSL to properly lighten or darken a color. Therefore, results from this function will differ from those much larger and much slower functions that use HSL.
jsFiddle with pSBC
github > pSBC Wiki
Features:
Auto-detects and accepts standard Hex colors in the form of strings. For ...