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Escape double quotes in a string
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In C# you can use the backslash to put special characters to your string.
For example, to put ", you need to write \".
There are a lot of characters that you write using the backslash:
Backslash with a number:
\000 null
\010 backspace
\011 horizontal tab
\012 new line
\015 carriage return
\032 su...
Django admin: How to display a field that is marked as editable=False' in the model?
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Use Readonly Fields. Like so (for django >= 1.2):
class MyModelAdmin(admin.ModelAdmin):
readonly_fields=('first',)
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what is the difference between sendStickyBroadcast and sendBroadcast in Android
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Here is what the Android SDK says about sendStickyBroadcast():
Perform a sendBroadcast(Intent) that
is "sticky," meaning the Intent you
are sending stays around after the
broadcast is complete, so that others
can quickly retrieve that data through
the return value of
registerRec...
What is so special about Generic.xaml?
I've been trying to figure out how to organize my ResourceDictionary files for reuse and sharing with other members of my team.
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Case insensitive access for generic dictionary
...ionary = ...;
var comparer = StringComparer.OrdinalIgnoreCase;
int? value;
foreach (var element in myDictionary)
{
if (String.Equals(element.Key, myKey, comparer))
{
value = element.Value;
break;
}
}
This saves you the cost of creating a new data structure, but in return the cost of ...
How can I use Bash syntax in Makefile targets?
...of your makefile, and you should be good to go.
BTW: You can also do this for one target, at least for GNU Make. Each target can have its own variable assignments, like this:
all: a b
a:
@echo "a is $$0"
b: SHELL:=/bin/bash # HERE: this is setting the shell for b only
b:
@echo "b is $$...
How to save as a new file and keep working on the original one in Vim?
...rectory. You probably have something in your vimrc file that is doing this for you. Some more information can be found here vim.wikia.com/wiki/Set_working_directory_to_the_current_file
– Derek
Jan 7 '15 at 21:27
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How to change column datatype from character to numeric in PostgreSQL 8.4
...if the USING fails, you'll have to clean up the non-numeric data by hand before changing the column type.
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pandas: multiple conditions while indexing data frame - unexpected behavior
...in terms of what you want to keep, not in terms of what you want to drop. For df1:
df1 = df[(df.a != -1) & (df.b != -1)]
You're saying "keep the rows in which df.a isn't -1 and df.b isn't -1", which is the same as dropping every row in which at least one value is -1.
For df2:
df2 = df[(df....
How to get the index of a maximum element in a numpy array along one axis
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this works fine for integers but what can I do for float values and the numbers between 0 and 1
– Priyom saha
Feb 23 '19 at 8:26
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