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What does $_ mean in PowerShell?
... the current value in the pipe line, which is called $PSItem in Powershell 3 and newer.
1,2,3 | %{ write-host $_ }
or
1,2,3 | %{ write-host $PSItem }
For example in the above code the %{} block is called for every value in the array. The $_ or $PSItem variable will contain the current val...
How to concatenate items in a list to a single string?
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answered Sep 17 '12 at 5:33
Burhan KhalidBurhan Khalid
144k1717 gold badges200200 silver badges247247 bronze badges
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C++11 reverse range-based for-loop
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234
Actually Boost does have such adaptor: boost::adaptors::reverse.
#include <list>
#inclu...
Uniq by object attribute in Ruby
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LaneLane
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How to use a custom comparison function in Python 3?
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53
Use the key argument (and follow the recipe on how to convert your old cmp function to a key fun...
How do you remove a specific revision in the git history?
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To combine revision 3 and 4 into a single revision, you can use git rebase. If you want to remove the changes in revision 3, you need to use the edit command in the interactive rebase mode. If you want to combine the changes into a single revisi...
What is the `data-target` attribute in Bootstrap 3?
...he system or behavior behind the data-target attribute used by Bootstrap 3?
2 Answers
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What is the difference between String.slice and String.substring?
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answered Feb 11 '10 at 10:36
Daniel VassalloDaniel Vassallo
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Iterate through a C++ Vector using a 'for' loop
... sifferman
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answered Oct 3 '12 at 5:59
Alok SaveAlok Save
185k4141 gold...
Why is rbindlist “better” than rbind?
...d will join by position
eg
do.call(rbind, list(data.frame(a = 1:2, b = 2:3), data.frame(b = 1:2, a = 2:3)))
## a b
## 1 1 2
## 2 2 3
## 3 2 1
## 4 3 2
rbindlist(list(data.frame(a = 1:5, b = 2:6), data.frame(b = 1:5, a = 2:6)))
## a b
## 1: 1 2
## 2: 2 3
## 3: 1 2
## 4: 2 3
Some...