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How to append multiple values to a list in Python
... I know there are few methods to do so, such as manually input the values, or put the append operation in a for loop, or the append and extend functions.
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Warning message: In `…` : invalid factor level, NA generated
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The warning message is because your "Type" variable was made a factor and "lunch" was not a defined level. Use the stringsAsFactors = FALSE flag when making your data frame to force "Type" to be a character.
> fixed <- data.frame("Type" = character(3), "Amount" = numeric(3))
> str(...
Is it good practice to use the xor operator for boolean checks? [closed]
I personally like the exclusive or , ^ , operator when it makes sense in the context of boolean checks because of its conciseness. I much prefer to write
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Coding Conventions - Naming Enums
Is there a convention for naming enumerations in Java?
7 Answers
7
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How to tell when UITableView has completed ReloadData?
I am trying to scroll to the bottom of a UITableView after it is done performing [self.tableView reloadData]
19 Answers
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What guarantees are there on the run-time complexity (Big-O) of LINQ methods?
...quite a bit, and I haven't really seen any mention of run-time complexity for any of the LINQ methods. Obviously, there are many factors at play here, so let's restrict the discussion to the plain IEnumerable LINQ-to-Objects provider. Further, let's assume that any Func passed in as a selector /...
Javascript object Vs JSON
...ation is where the key contains a special character (if, :, - etc). It is worth noting that a key in JSON must be enclosed in double quotes.
If I convert the above object to JSON using var jSonString = JSON.stringify(testObject);, what is the difference between the 2 (JS obj and JSON)?
JSON is ...
Omitting the first line from any Linux command output
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Pipe it to awk:
awk '{if(NR>1)print}'
or sed
sed -n '1!p'
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What is the `sensor` parameter for in the Google Places API?
The Google Places API requests have a sensor parameter? How does this parameter affect the results?
3 Answers
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How to upgrade Git on Windows to the latest version?
I just upgraded to Git 1.8.0.1 for Windows, from my previous version 1.7.9.mysysgit.0. I downloaded the new version from the Git site and installed through the normal Git installer EXE.
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