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Client-server synchronization pattern / algorithm?
...and I can share a couple ways it has evolved as the app usage has grown.
I started by logging every change (insert, update or delete) from any device into a "history" table. So if, for example, someone changes their phone number in the "contact" table, the system will edit the contact.phone field, a...
Regex Named Groups in Java
...look behind or group name
ch = read();
int start = cursor;
[...]
// test forGroupName
int startChar = ch;
while(ASCII.isWord(ch) && ch != '>') ch=read();
if(ch == '>'){
/...
Using SASS with ASP.NET [closed]
...isual Studio, you could install the last version of Web Essential which is starting to support Sass (SCSS syntax). Alternatively you could install Sassy Studio or Web Workbench.
Then to compile your .sass/.scss files in your ASP.NET project, there is some different tools: via Web Essential, Web Wor...
JavaScript to scroll long page to DIV
...general purpose "scroll into view" routine from scratch, you would need to start at the node you want to expose, make sure it's in the visible portion of it's parent, then repeat the same for the parent, etc, all the way until you reach the top.
One step of this would look something like this (unte...
Simulating Slow Internet Connection
...es at the wrong protocol level so you do not get to properly simulate slow start.
– Sam Saffron
Mar 16 '12 at 0:07
@Sa...
Algorithm to detect corners of paper sheet in photo
...but your second image, but are you defining a threshold tolerance for your start and end values in the accumulator? The HT doesn't really define start and end positions, rather the m and c values in y=mx+c. See here - note that this is using polar coordinates in the accumulator rather than cartesian...
Best way to define private methods for a class in Objective-C
I just started programming Objective-C and, having a background in Java, wonder how people writing Objective-C programs deal with private methods.
...
Media Queries: How to target desktop, tablet, and mobile?
...o the comment, min-width is standard in "mobile-first" design, wherein you start by designing for your smallest screens, and then add ever-increasing media queries, working you way onto larger and larger screens. Regardless of whether you prefer min-, max-, or combinations thereof, be cognizant of t...
Fastest way to determine if an integer's square root is an integer
... In my actual code, I use the following modified loop:
int64 r, t, z;
r = start[(x >> 3) & 1023];
do {
z = x - r * r;
if( z == 0 )
return true;
if( z < 0 )
return false;
t = z & (-z);
r += (z & t) >> 1;
if( r > (t >> 1) )
...
HTML5 record audio to file
...set><legend>RECORD AUDIO</legend>
<input onclick="startRecording()" type="button" value="start recording" />
<input onclick="stopRecording()" type="button" value="stop recording and play" />
</fieldset>
<script>
...