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The Role Manager feature has not been enabled
...
304
You can do this by reading from the boolean property at:
System.Web.Security.Roles.Enabled
T...
What is the right way to override a setter method in Ruby on Rails?
...========================================================
Update: July 19, 2017
Now the Rails documentation is also suggesting to use super like this:
class Model < ActiveRecord::Base
def attribute_name=(value)
# custom actions
###
super(value)
end
end
=======================...
IF statement: how to leave cell blank if condition is false (“” does not work)
... COUNTBLANK, which will count "" as blank, so basically =COUNTBLANK(C1)>0 means that C1 is blank or has "".
If you need to remove blank cells in a column, I would recommend filtering on the column for blanks, then selecting the resulting cells and pressing Del. After which you can remove the fi...
Pandas conditional creation of a series/dataframe column
...here(df['Set']=='Z', 'green', 'red')
print(df)
yields
Set Type color
0 Z A green
1 Z B green
2 X B red
3 Y C red
If you have more than two conditions then use np.select. For example, if you want color to be
yellow when (df['Set'] == 'Z') & (df['Type'] == ...
Android: Coloring part of a string using TextView.setText()?
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201
Use spans.
Example:
final SpannableStringBuilder sb = new SpannableStringBuilder("your text h...
Can we append to a {% block %} rather than overwrite?
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205
{% block javascript %}
{{ block.super }}
... more content ...
{% endblock %}
See: Dja...
How to properly document S4 class slots using Roxygen2?
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30
Updated answer for Roxygen2 5.0.1, current as of 6.0.1
For S4, the best practice now is documen...
How do I make a dotted/dashed line in Android?
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Without java code:
drawable/dotted.xml:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="line">
<stroke
android:color="#C7B299"
android:dashWidth="10px"
android:dashGap="10p...
Psql list all tables
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204
If you wish to list all tables, you must use:
\dt *.*
to indicate that you want all tables i...
How to cast/convert pointer to reference in C++
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answered Apr 16 '12 at 10:53
David HeffernanDavid Heffernan
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