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Navigation in django
...done my first little webapp in django and I love it. I'm about to start on converting an old production PHP site into django and as part its template, there is a navigation bar.
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AngularJS directive with default options
I'm just starting with angularjs, and am working on converting a few old JQuery plugins to Angular directives. I'd like to define a set of default options for my (element) directive, which can be overridden by specifying the option value in an attribute.
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Printf width specifier to maintain precision of floating-point value
Is there a printf width specifier which can be applied to a floating point specifier that would automatically format the output to the necessary number of significant digits such that when scanning the string back in, the original floating point value is acquired?
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URL encoding the space character: + or %20?
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And the URLEncoder.encode() method in Java converts it in + as well.
– рüффп
Oct 24 '14 at 12:48
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Difference between Python datetime vs time modules
...nce 00:00:00 UTC, Thursday, 1 January 1970. The function time.localtime(t) converts the epoch time to a local time tuple. So, the answer to your question is «no».
– Serge Stroobandt
May 6 '18 at 17:07
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How to parse XML to R data frame
... packages required to read XML files.
library("XML")
library("methods")
# Convert the input xml file to a data frame.
xmldataframe <- xmlToDataFrame("input.xml")
print(xmldataframe)
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Static methods in Python?
...MyClass(object):
@staticmethod
def the_static_method(x):
print(x)
MyClass.the_static_method(2) # outputs 2
Note that some code might use the old method of defining a static method, using staticmethod as a function rather than a decorator. This should only be used if you have to su...
Hex representation of a color with alpha channel?
... an hex to rgba:
background:
rgba(#000, 0.5);
And the preprocessor just converts the hex code to rgb automatically.
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Can I have multiple primary keys in a single table?
...e from two or more columns. For example:
CREATE TABLE userdata (
userid INT,
userdataid INT,
info char(200),
primary key (userid, userdataid)
);
Update: Here is a link with a more detailed description of composite primary keys.
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Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign
... primary key and the error that occurred on that row...
This is in C#, but converting it to VB should not be hard.
foreach (DataRow dr in dataTable)
{
if (dr.HasErrors)
{
Debug.Write("Row ");
foreach (DataColumn dc in dataTable.PKColumns)
Debug.Write(dc.ColumnName...