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Array vs. Object efficiency in JavaScript
...sically an array with holes in it, because every array does have continous indexing. It's slower than arrays without holes. But iterating manually through the array is even slower (mostly).
This is an object:
var a3 = {};
a3[29938] = "a";
a3[32994] = "b";
Here is a performance test of three poss...
How do I implement IEnumerable
...ect> mylist = new List<MyObject>();
public MyObject this[int index]
{
get { return mylist[index]; }
set { mylist.Insert(index, value); }
}
public IEnumerator<MyObject> GetEnumerator()
{
return mylist.GetEnumerator();
}
IE...
How do I remove duplicate items from an array in Perl?
...
You can do something like this as demonstrated in perlfaq4:
sub uniq {
my %seen;
grep !$seen{$_}++, @_;
}
my @array = qw(one two three two three);
my @filtered = uniq(@array);
print "@filtered\n";
Outputs:
one two three
If you want to use a module, try the uniq fun...
What is difference between Collection.stream().forEach() and Collection.forEach()?
... for:each 53 171 1262 11164 111005
for with index 39 112 920 8577 89212
iterable.stream.forEach 255 324 1030 8519 88419
If you repeat the experiment, I posted the full source code. Please do edit this answer and add you results with a notation ...
How to go about formatting 1200 to 1.2k in java
...tring result = new DecimalFormat("##0E0").format(number);
Integer index = Character.getNumericValue(result.charAt(result.length() - 1)) / 3;
result = result.replaceAll("E[0-9]", METRIC_PREFIXES[index]);
while (result.length() > MAX_LENGTH || TRAILING_DECIMAL_POINT.matche...
How to decompile a whole Jar file? [closed]
... a jar: since 0.2.5, All files, in JAR files, are displayed.
See also the question "How do I “decompile” Java class files?".
The JD-Eclipse doesn't seem to have changed since late 2009 though (see Changes).
So its integration with latest Eclipse (3.8, 4.2+) might be problematic.
JD-Core is acti...
Are foreign keys really necessary in a database design?
... at the data level. They also improve performance because they're normally indexed by default.
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Using arrays or std::vectors in C++, what's the performance gap?
...en from the internet):
// Comparison of assembly code generated for basic indexing, dereferencing,
// and increment operations on vectors and arrays/pointers.
// Assembly code was generated by gcc 4.1.0 invoked with g++ -O3 -S on a
// x86_64-suse-linux machine.
#include <vector>
struct...
Binding IIS Express to an IP Address [duplicate]
...Registration completed for site "MyWebSite"
IIS Express is running.
Enter 'Q' to stop IIS Express
The configuration file (applicationhost.config) had a section added as follows:
<sites>
<site name="MyWebsite" id="2">
<application path="/" applicationPool="Clr4IntegratedAppPoo...
Remove Fragment Page from ViewPager in Android
... this.pages = pages;
}
@Override
public Fragment getItem(int index) {
return pages.get(index);
}
@Override
public int getCount() {
return pages.size();
}
@Override
public int getItemPosition(Object object) {
int index = pages.indexOf (o...