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Using lambda expressions for event handlers
... the exact same code that you are used to working with.
The compiler will convert the code you have to something like this:
public partial class MyPage : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
//snip
MyButton.Click += new EventHandler(de...
Java regex capturing groups indexes
...alls.
You can access the text matched by certain group with Matcher.group(int group). The group numbers can be identified with the rule stated above.
In some regex flavors (PCRE, Perl), there is a branch reset feature which allows you to use the same number for capturing groups in different branch...
Turning live() into on() in jQuery
... question. I assume others will stumble over this as well when they try to convert all the bind, live and delegate calls to on.
– Felix Kling
Nov 5 '11 at 16:30
...
Should switch statements always contain a default clause?
...e preceding the switch.
}
This was an over-simplified example, but the point is that someone reading the code shouldn't wonder why variable cannot be something other than 1 or 2.
The only case I can think of to NOT use default is when the switch is checking something where its rather obvious ev...
How to plot two histograms together in R?
...
+1 thank you all, can this be converted to a smoother gistogram (like had.co.nz/ggplot2/graphics/55078149a733dd1a0b42a57faf847036.png)?
– David B
Aug 25 '10 at 9:48
...
Linq to EntityFramework DateTime
...but rather than trying to add days to p.startdat (something that cannot be converted to a sql statement) why not do something that can be equated to sql:
var baselineDate = DateTime.Now.AddHours(-24);
something.Where(p => p.startdate >= baselineDate)
...
How do I design a class in Python?
...one database. It internally would store a specific format but could easily convert to other formats when outputting (Postgres, MySQL, MongoDB).
Now let's think through the Database object. What does this hide and store? Well clearly it can't store the full contents of the database, since that is wh...
Get image data url in JavaScript?
...cation here.
If you have this JS loaded (prior to when it's needed), then converting to dataURL is as simple as:
examples
HTML
<img src="/yo.jpg" onload="console.log(this.toDataURL('image/jpeg'))">
JS
console.log(document.getElementById("someImgID").toDataURL());
GPU fingerprinting
I...
How to find memory leak in a C++ code/project?
... to house a string.
delete [] str; // Clear those 30 bytes and make str point nowhere.
2
Reallocate memory only if you've deleted. In the code below, str acquires a new address with the second allocation. The first address is lost irretrievably, and so are the 30 bytes that it pointed to. Now th...
Time complexity of Sieve of Eratosthenes algorithm
...sqrt(n) so overall time complexity will O(sqrt(n)loglog(n)):
void isprime(int n)
{
int prime[n],i,j,count1=0;
for(i=0;i<n;i++)
{
prime[i]=1;
}
prime[0]=prime[1]=0;
for(i=2;i<=n;i++)
{
if(prime[i]==1)
{
printf("%d ",i);
...