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Why does a return in `finally` override `try`?
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@Castrohenge - it's not a hard and fast rule, but most of the copunter-examples in that thread are pretty contrived, and the only valid case I see is the "guard clause" (essentially the pattern of checking input data at the top of the function and returnin...
What does the “map” method do in Ruby?
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The map method takes an enumerable object and a block, and runs the block for each element, outputting each returned value from the block (the original object is unchanged unless you use map!):
[1, 2, 3].map { |n| n * n } #=> [1, 4, 9]
Array and Range are enume...
How to delete a row by reference in data.table?
...estion. data.table can't delete rows by reference yet.
data.table can add and delete columns by reference since it over-allocates the vector of column pointers, as you know. The plan is to do something similar for rows and allow fast insert and delete. A row delete would use memmove in C to budge u...
Check folder size in Bash
I'm trying to write a script that will calculate a directory size and if the size is less than 10GB, and greater then 2GB do some action. Where do I need to mention my folder name?
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Save Screen (program) output to a file
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There is a command line option for logging. The output is saved to screenlog.n file, where n is a number of the screen.
From man pages of screen:
‘-L’ Tell screen to turn on automatic output logging for the windows.
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Easy way to dismiss keyboard?
...ve quite a few controls scattered throughout many table cells in my table, and I was wondering if there's an easier way to dismiss the keyboard without having to loop through all my controls and resigning them all as the first responder. I guess the question is.. How would I get the current first re...
pandas: multiple conditions while indexing data frame - unexpected behavior
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As you can see, the AND operator drops every row in which at least one
value equals -1. On the other hand, the OR operator requires both
values to be equal to -1 to drop them.
That's right. Remember that you're writing the condition in te...
Good tutorials on XMPP? [closed]
I've been looking at some open-source XMPP servers, and am familiar with the official page http://xmpp.org/ . But thus far I've not found anything in between " The Extensible Messaging and Presence Protocol (XMPP) is an open technology for real-time communication " and a list of XEP specifications....
Looping through a hash, or using an array in PowerShell
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Christian's answer works well and shows how you can loop through each hash table item using the GetEnumerator method. You can also loop through using the keys property. Here is an example how:
$hash = @{
a = 1
b = 2
c = 3
}
$hash.Keys | % { "...
SFTP Libraries for .NET [closed]
... now I'm looking at products such as SecureBlackbox, IPWorks SSH, WodSFTP, and Rebex SFTP. However, I have never used any SFTP library before so I'm not sure what I'm looking for.
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