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Evaluate expression given as a string
I'm curious to know if R can use its eval() function to perform calculations provided by e.g. a string.
7 Answers
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How can I transform string to UTF-8 in C#?
I have a string that I receive from a third party app and I would like to display it correctly in any language using C# on my Windows Surface.
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Does Python optimize tail recursion?
...ever will since Guido van Rossum prefers to be able to have proper tracebacks:
Tail Recursion Elimination (2009-04-22)
Final Words on Tail Calls (2009-04-27)
You can manually eliminate the recursion with a transformation like this:
>>> def trisum(n, csum):
... while True: ...
How to create a cron job using Bash automatically without the interactive editor?
...* * * "command to be executed"
- - - - -
| | | | |
| | | | ----- Day of week (0 - 7) (Sunday=0 or 7)
| | | ------- Month (1 - 12)
| | --------- Day of month (1 - 31)
| ----------- Hour (0 - 23)
------------- Minute (0 - 59)
Source nixCraft.
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Where's my JSON data in my incoming Django request?
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If you are posting JSON to Django, I think you want request.body (request.raw_post_data on Django < 1.4). This will give you the raw JSON data sent via the post. From there you can process it further.
Here is an example using JavaScript, jQuery, jquery-json and ...
Getting value of select (dropdown) before change
...the previous value after the change
alert(previous);
// Make sure the previous value is updated
previous = this.value;
});
})();
Working example: http://jsfiddle.net/x5PKf/766
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How to echo with different colors in the Windows command line
I know that the color bf command sets the colors of the whole command line window but I wanted to to print one single line in a different color.
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Return a value if no rows are found in Microsoft tSQL
...thing returned. I'd prefer that false (0) is returned in that scenario. Looking for the simplest method to account for no records.
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Paste in insert mode?
...lipboard
CTRL-R " (the unnamed register) inserts the last delete or yank.
To find this in vim's help type :h i_ctrl-r
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How to fully remove Xcode 4
I want to remove all existing SDK versions as well as Xcode 4.
7 Answers
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