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Storing JSON in database vs. having a new column for each key
...iginal statement that your default preference, when using a relational database, should still be column-per-value. Relational databases are still built on the assumption of that the data within them will be fairly well normalized. The query planner has better optimization information when looking at...
Reading an image file into bitmap from sdcard, why am I getting a NullPointerException?
...
I wrote the following code to convert an image from sdcard to a Base64 encoded string to send as a JSON object.And it works great:
String filepath = "/sdcard/temp.png";
File imagefile = new File(filepath);
FileInputStream fis = null;
try {
fis = new FileInputStream(imagefile);
} ...
RESTfully design /login or /register resources?
... the login form
POST /session authenticates credentials against database
DELETE /session destroys session and redirect to /
GET /users/new gets the webpage that has the registration form
POST /users records the entered information into database as a new /user/xxx
GET /users/xxx // gets a...
Where are my postgres *.conf files?
...ntu 8.04 after update. Used EnterpriseDB package. I can connect to the database locally, I see system DB postgres but I can't configure it because I can't find config files. Searched through entire hard drive and found only samples like pg_hba.conf.sample
...
How to set Bullet colors in UL/LI html lists via CSS without using any images or span tags [duplicat
...you tried this alternative?
li{
list-style-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAQAAAAECAYAAACp8Z5+AAAAE0lEQVQIW2NkYGD4D8RwwEi6AACaVAQBULo4sgAAAABJRU5ErkJggg==");
}
sounds hard, but you can make your own png image/pattern here, then copy/paste your code and customize you...
How does the Amazon Recommendation feature work?
...8", (2008).
A. Töscher, M. Jahrer, R. Legenstein, "Improved Neighborhood-Based Algorithms for Large-Scale Recommender Systems", SIGKDD Workshop on Large-Scale Recommender Systems and the Netflix Prize Competition (KDD’08) , ACM Press (2008).
Y. Koren, "The BellKor Solution to the Netflix Gran...
Font size in CSS - % or em?
...mpletely avoids certain really annoying browser quirks when it comes to em-based line-heights
– Már Örlygsson
Oct 29 '08 at 3:39
17
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Android Archive Library (aar) vs standard jar
...se Proguard on your library to obfuscate your classes but as with any Java-based bytecode, there's no way to stop people from decompiling your code.
– unify
Apr 13 '17 at 18:16
...
getApplication() vs. getApplicationContext()
...ng at the Android code, you see that when attached, an activity receives a base context and an application, and those are different parameters. getApplicationContext() delegates it's call to baseContext.getApplicationContext().
One more thing : the documentation says that it most cases, you shouldn...
How to convert IPython notebooks to PDF and HTML?
... HTML.
List of current available profiles:
$ ls -l1 profile|cut -d. -f1
base_html
blogger_html
full_html
latex_base
latex_sphinx_base
latex_sphinx_howto
latex_sphinx_manual
markdown
python
reveal
rst
Give you the existing profiles.
(You can create your own, cf future doc, ./nbconvert2.py --hel...