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Removing index column in pandas when reading a csv
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Difference between Destroy and Delete
...once. It
generates at least one SQL DELETE query per record (or possibly more,
to enforce your callbacks). If you want to delete many rows quickly,
without concern for their associations or callbacks, use delete_all
instead.
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ActiveRecord: size vs count
... records using both Model.size and Model.count . If you're dealing with more complex queries is there any advantage to using one method over the other? How are they different?
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JavaScript: Overriding alert()
...u can also bypass the call to the original function if you want (proxied)
More info here: JQuery Types #Proxy Pattern
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How to select the rows with maximum values in each group with dplyr? [duplicate]
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This more verbose solution provides greater control on what happens in case of duplicate maximum value (in this example, it will take one of the corresponding rows randomly)
library(dplyr)
df %>% group_by(A, B) %>%
mutate...
What does the restrict keyword mean in C++?
...n arguments.
This restricts how the function can be called, but allows for more compile optimizations.
If the caller does not follow the restrict contract, undefined behavior.
The C99 N1256 draft 6.7.3/7 "Type qualifiers" says:
The intended use of the restrict qualifier (like the register storage c...
Switching to a TabBar tab view programmatically?
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Note that, if the index maps to a tab within the More view controller (should you have more than five tabs), this will not work. In that case, use -setSelectedViewController:.
– Joe D'Andrea
Mar 2 '12 at 15:43
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How to align checkboxes and their labels consistently cross-browsers
... many times in the comments, this answer does not work on most browsers anymore (and seems to be failing to do that since 2013).
After over an hour of tweaking, testing, and trying different styles of markup, I think I may have a decent solution. The requirements for this particular project were:
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