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SQL (MySQL) vs NoSQL (CouchDB) [closed]
...re lots about users and then things like a lot of their messages, comments etc. I have always used MySQL before but now I am minded to try something new like couchdb or similar which is not SQL.
...
Why do I get a “Null value was assigned to a property of primitive type setter of” error message whe
...ull value cannot be assigned to a primitive type, like int, long, boolean, etc. If the database column that corresponds to the field in your object can be null, then your field should be a wrapper class, like Integer, Long, Boolean, etc.
The danger is that your code will run fine if there are no nu...
Shortcut to comment out a block of code with sublime text
...
Ctrl-/ will insert // style commenting, for javascript, etc
Ctrl-/ will insert <!-- --> comments for HTML,
Ctrl-/ will insert # comments for Ruby,
..etc
But does not work perfectly on HTML <script> tags.
HTML <script> ..blah.. </script> tags:
Ctrl-/ twice...
how to read System environment variable in Spring applicationContext
...ing system environment variables (i.e. OS-level variables set with export, etc), it only allows reading Java system properties.
– amoe
Nov 15 '13 at 13:24
2
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Passing a 2D array to a C++ function
... TwoD>
void myFunction(TwoD& myArray){
myArray[x][y] = 5;
etc...
}
// call with
double anArray[10][10];
myFunction(anArray);
It works with any 2D "array-like" datastructure, such as std::vector<std::vector<T>>, or a user defined type to maximize code reuse.
...
Using do block vs braces {}
...u are doing a small operation, for example, a method call or a comparison, etc. so this makes perfect sense:
some_collection.each { |element| puts element }
But if you have slightly complex logic that goes to multiple lines then use do .. end like:
1.upto(10) do |x|
add_some_num = x + rand(10)...
Getting a list of associative array keys
...ck note. Be wary of using for..in if you use a library (jQuery, Prototype, etc.), as most of them add methods to created Objects (including dictionaries).
This will mean that when you loop over them, method names will appear as keys. If you are using a library, look at the documentation and look for...
How to view UTF-8 Characters in VIM or Gvim
...
In Linux, Open the VIM configuration file
$ sudo -H gedit /etc/vim/vimrc
Added following lines:
set fileencodings=utf-8,ucs-bom,gb18030,gbk,gb2312,cp936
set termencoding=utf-8
set encoding=utf-8
Save and exit, and terminal command:
$ source /etc/vim/vimrc
At this time VIM wil...
How to create the perfect OOP application [closed]
...ct and ShoppingCartItem. Product should have the product name, tax status, etc. but not quantity. Quantity is not a property of a product - it'll be different for each customer of the company who buys that particular product.
ShoppingCartItem should have a Product and the quantity. That way the cust...
How can I color Python logging output?
...ndlers or propagated to other loggers. If you have configured file loggers etc. you probably don't want to have the colors in the log files. To avoid that, it's probably best to simply create a copy of record with copy.copy() before manipulating the levelname attribute, or to reset the levelname to ...