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Rails migration for has_and_belongs_to_many join table
...ll => false
t.references :orange, :null => false
end
# Adding the index can massively speed up join tables. Don't use the
# unique if you allow duplicates.
add_index(:apples_oranges, [:apple_id, :orange_id], :unique => true)
If you use the :unique => true on the index, then you shou...
how to return index of a sorted list? [duplicate]
I need to sort a list and then return a list with the index of the sorted items in the list. For example, if the list I want to sort is [2,3,1,4,5] , I need [2,0,1,3,4] to be returned.
...
SQL Server: Make all UPPER case to Proper Case/Title Case
... VARCHAR(255)) RETURNS VARCHAR(255)
AS
BEGIN
DECLARE @i INT -- index
DECLARE @l INT -- input length
DECLARE @c NCHAR(1) -- current char
DECLARE @f INT -- first letter flag (1/0)
DECLARE @o VARCHAR(255) -- output string
DECLARE @w VARCHAR(10) -- chara...
Build a Basic Python Iterator
... def __init__(self, text):
self.text = text.upper()
self.index = 0
def __iter__(self):
return self
def __next__(self):
try:
result = self.text[self.index]
except IndexError:
raise StopIteration
self.index += 1
...
python dataframe pandas drop column using int
...('column name', axis=1). Is there a way to drop a column using a numerical index instead of the column name?
9 Answers
...
Can I set an opacity only to the background image of a div?
...t;
Hi there
</div>
CSS
.myDiv {
position: relative;
z-index: 1;
}
.myDiv .bg {
position: absolute;
z-index: -1;
top: 0;
bottom: 0;
left: 0;
right: 0;
background: url(test.jpg) center center;
opacity: .4;
width: 100%;
height: 100%;
}
See...
Jinja2 template variable if None Object set a default value
...
This works for a simple variable, but not for this question where you're looking to grab a field out of a more complex one. I would downvote this, since it's not a good answer to the original question... and yet at the same time, knowing about default is exactly what I neede...
Manipulating an Access database from Java without ODBC
...s databases without using ODBC. It uses two other packages, Jackcess and HSQLDB, to perform these tasks. The following is a brief overview of how to get it set up.
Option 1: Using Maven
If your project uses Maven you can simply include UCanAccess via the following coordinates:
groupId: net.sf...
ViewBag, ViewData and TempData
...e View.
public class OneController: Controller
{
public ActionResult Index()
{
TempData["foo"] = "bar";
return RedirectToAction("index", "two");
}
}
public class TwoController: Controller
{
public ActionResult Index()
{
var model = new MyViewModel
...
How do I wrap text in a pre tag?
...e in a text area too if you want to copy to clipboard.
The following is a php excerpt so if your not in php then the way you pack the html special chars will vary.
<textarea style="font-family:monospace;" onfocus="copyClipboard(this);"><?=htmlspecialchars($codeBlock);?></textarea>...