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How can I check if an element exists in the visible DOM?
How do you test an element for existence without the use of the getElementById method?
25 Answers
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How to convert a factor to integer\numeric without loss of information?
When I convert a factor to a numeric or integer, I get the underlying level codes, not the values as numbers.
10 Answers
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the source file is different from when the module was built
This is driving me crazy.
27 Answers
27
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Abort makefile if variable not set
...empty values,
# die with an error otherwise.
#
# Params:
# 1. Variable name(s) to test.
# 2. (optional) Error message to print.
check_defined = \
$(strip $(foreach 1,$1, \
$(call __check_defined,$1,$(strip $(value 2)))))
__check_defined = \
$(if $(value $1),, \
$(error Unde...
Cloning a MySQL database on the same MySql instance
... a script which copies my current database sitedb1 to sitedb2 on the same mysql database instance. I know I can dump the sitedb1 to a sql script:
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Can you help me understand Moq Callback?
... a doc bug...
EDIT: In response to your clarification...
For each mocked method Setup you perform, you get to indicate things like:
constraints on inputs
the value for / way in which the return value (if there is one) is to be derived
The .Callback mechanism says "I can't describe it right now...
Stop Excel from automatically converting certain text values to dates
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This doesn't work for me in Excel 2010 if the text is too long :(
– steve
Mar 31 '14 at 15:09
7
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log messages appearing twice with Python Logging
I'm using Python logging, and for some reason, all of my messages are appearing twice.
8 Answers
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What can I do to resolve a “Row not found or changed” Exception in LINQ to SQL on a SQL Server Compa
...load it successfully and set the column-String to null.
Now you change something and call
SubmitChanges().
LINQ will generate a SQL query
containing "WHERE [title] IS NULL", to make sure the title has not been changed by someone else.
LINQ looks up the properties of
[title] in the mapping.
LINQ wi...
How to check if a process is running via a batch script
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Another possibility I came up with, inspired by using grep, is:
tasklist /FI "IMAGENAME eq myapp.exe" 2>NUL | find /I /N "myapp.exe">NUL
if "%ERRORLEVEL%"=="0" echo Program is running
It doesn't need to save an extra file, so I prefer this ...