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When to use IMG vs. CSS background-image?
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Proper uses of IMG
Use IMG if you intend to have
people print your page and you want the image to be included by default.
—JayTee
Use IMG (with alt text) when the image has an important semantic meaning, such as a warning icon. This ensures that th...
Why do we need the “finally” clause in Python?
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It makes a difference if you return early:
try:
run_code1()
except TypeError:
run_code2()
return None # The finally block is run before the method returns
finally:
other_code()
Compare to this:
try:
run_code1()
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C# How can I check if a URL exists/is valid?
...ownloads the historical data, and then plots the price history for the specified ticker symbol.
12 Answers
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How to limit UITableView row reordering to a section
...exPath toProposedIndexPath:(NSIndexPath *)proposedDestinationIndexPath
{
if (sourceIndexPath.section != proposedDestinationIndexPath.section) {
NSInteger row = 0;
if (sourceIndexPath.section < proposedDestinationIndexPath.section) {
row = [tableView numberOfRowsInSection:sourceInd...
How to handle click event in Button Column in Datagridview?
... at MSDN to hardcode the column index or column name in order to determine if a button was clicked. The click event registers for the entire grid, so somehow you need to determine that a button was clicked, but you should not do so by assuming that your button lives in a particular column name or i...
Transaction count after EXECUTE indicates a mismatching number of BEGIN and COMMIT statements. Previ
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If you have a TRY/CATCH block then the likely cause is that you are catching a transaction abort exception and continue. In the CATCH block you must always check the XACT_STATE() and handle appropriate aborted and uncommitabl...
Check if class already assigned before adding
In jQuery, is it recommended to check if a class is already assigned to an element before adding that class? Will it even have any effect at all?
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Check if a string contains another string
I want to find if a string contains a ","(comma) in it. Do we have any other option other than reading char-by-char?
4 Answ...
How to know if an object has an attribute in Python
Is there a way in Python to determine if an object has some attribute? For example:
14 Answers
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How to save/restore serializable object to/from file?
... and I know that the object has to be Serializable . But it would be nice if I can get an example. For example if I have the following:
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