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Checking if a list is empty with LINQ
...ist<Object>();
Stopwatch watch = new Stopwatch();
int x;
watch.Start();
for (var i = 0; i <= 1000000; i++)
{
if (myList.Count() == 0) x = i;
}
watch.Stop();
Stopwatch watch2 = new Stopwatch();
watch2.Start();
for (var i = 0; i <= 1000000; i++)
{
if (!myList.Any(...
Good Hash Function for Strings
...mes, such as URLs: they will all have the same hash code (because they all start with "http://", which means that they are stored under the same bucket in a hash map, exhibiting terrible performance.
Here's a war story paraphrased on the String hashCode from "Effective Java":
The String hash fu...
A potentially dangerous Request.Form value was detected from the client
...obalFilters.Filters.Add(new ValidateInputAttribute(false)); in Application_Start().
– Alex
Jul 18 '12 at 11:14
15
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Understanding Spring @Autowired usage
...alidate that the injected beans are not null and fail fast when you try to start the application and avoid a NullPointerException when you need to actually use the bean.
Update: To complete the picture, I created a new question about the @Configuration class.
...
Emulator error: This AVD's configuration is missing a kernel file
...he other copy. I removed one of my copies of the SDK and then my emulator started right up.
– sffc
Jul 13 '15 at 6:43
...
How to run function in AngularJS controller on document ready?
...
Angular has several timepoints to start executing functions. If you seek for something like jQuery's
$(document).ready();
You may find this analog in angular to be very useful:
$scope.$watch('$viewContentLoaded', function(){
//do something
});
This...
How do you use bcrypt for hashing passwords in PHP?
...
Please note that this answer, while good, is starting to show its age. This code (like any PHP implementation relying on crypt()) is subject to a security vulnerability pre-5.3.7, and is (very slightly) inefficient post-5.3.7 - details of the relevant issue can be found...
How to trigger a phone call when clicking a link in a web page on mobile phone
...
Just use HTML anchor tag <a> and start the attribute href with tel:. I suggest starting the phone number with the country code. pay attention to the following example:
<a href="tel:+989123456789">NO Different What it is</a>
For this example, t...
Not able to access adb in OS X through Terminal, “command not found”
... following (or verify via Configure > SDK Manager in the Android Studio startup screen):
Linux: $HOME/Android/Sdk
macOS: $HOME/Library/Android/sdk
Find out which shell profile to edit, depending on which file is used:
Linux: typically $HOME/.bashrc
macOS: typically $HOME/.bash_profile
With ...
How to take column-slices of dataframe in pandas
...tation that Python lists do for both row and columns. Slice notation being start:stop:step
# slice from 'foo' to 'cat' by every 2nd column
df.loc[:, 'foo':'cat':2]
# foo quz cat
# slice from the beginning to 'bar'
df.loc[:, :'bar']
# foo bar
# slice from 'quz' to the end by 3
df.loc[:, 'quz'::3]
...