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What's the best manner of implementing a social activity stream? [closed]
...
I have created such system and I took this approach:
Database table with the following columns: id, userId, type, data, time.
userId is the user who generated the activity
type is the type of the activity (i.e. Wrote blog post, added photo, commented on user's photo)
data is a se...
Ship an application with a database
If your application requires a database and it comes with built in data, what is the best way to ship that application? Should I:
...
Define global variable in a JavaScript function
...er: There's no reason whatsoever to use eval there. Instead: window[dynamic_variable_name] = dynamic_variable_value;
– T.J. Crowder
Mar 10 '16 at 10:05
| ...
Server.UrlEncode vs. HttpUtility.UrlEncode
.../?#[]@!$&'()*+,;=
And the unreserved characters are alphanumeric and -._~
The Verdict
Uri.EscapeDataString clearly defines its mission: %-encode all reserved and illegal characters. WebUtility.UrlEncode is more ambiguous in both definition and implementation. Oddly, it encodes some reserved char...
Sort a Map by values
...arator implements Comparator<String> {
Map<String, Double> base;
public ValueComparator(Map<String, Double> base) {
this.base = base;
}
// Note: this comparator imposes orderings that are inconsistent with
// equals.
public int compare(String a, St...
SQL update from one Table to another based on a ID match
I have a database with account numbers and card numbers . I match these to a file to update any card numbers to the account number, so that I am only working with account numbers.
...
FFMPEG (libx264) “height not divisible by 2”
... is:
-vf "pad=ceil(iw/2)*2:ceil(ih/2)*2"
Command:
ffmpeg -r 24 -i frame_%05d.jpg -vcodec libx264 -y -an video.mp4 -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2"
Basically, .h264 needs even dimensions so this filter will:
Divide the original height and width by 2
Round it up to the nearest pixel
Multipl...
What is the difference between Python and IPython?
...out of using Python, with:
Powerful Python shells (terminal and Qt-based).
A web-based notebook with the same core features but support for code, text, mathematical expressions, inline plots and other rich media.
Support for interactive data visualization and use of GUI toolkits.
Flexi...
Rails - Validate Presence Of Association?
...Validations/ClassMethods/validates_presence_of
class A < ActiveRecord::Base
has_many :bs
validates_presence_of :bs
end
or just validates
http://apidock.com/rails/ActiveModel/Validations/ClassMethods/validates
class A < ActiveRecord::Base
has_many :bs
validates :bs, :presence => ...
Getting the name of the currently executing method
...me util:
public class MethodNameTest {
private static final int CLIENT_CODE_STACK_INDEX;
static {
// Finds out the index of "this code" in the returned stack trace - funny but it differs in JDK 1.5 and 1.6
int i = 0;
for (StackTraceElement ste : Thread.currentThread...