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The Concept of 'Hold space' and 'Pattern space' in sed
...irst command is not executed; h copies the first line into the hold space.
now the second line replaces whatever was in the pattern space
on the second line, first we execute G, appending the contents of the hold buffer to the pattern buffer, separating it by a newline. The pattern space now contain...
How to upgrade all Python packages with pip?
...
Right :( The issue now lives at github.com/pypa/pip/issues/59 . But every suggestion seems to be answered with "Yeah, but I'm too sure if X is the right way to do Y"... Now is better than never? Practicality beats purity? :(
...
How do I switch between the header and implementation file in Xcode 4?
...
Not in Lion anymore... That's now Mission Control :-/
– Arne
Aug 17 '11 at 21:02
2
...
How do I extract a sub-hash from a hash?
...gt; 4}
extracted_slice = initial_hash.slice!(:a, :c)
initial_hash would now be
{:b => 2, :d =>4}
extracted_slide would now be
{:a => 1, :c =>3}
You can look at slice.rb in ActiveSupport 3.1.3
share
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Better naming in Tuple classes than “Item1”, “Item2”
...struct), while Tuple is an immutable reference type (class). As far as I know, there's no way to get a reference type Tuple with friendly item names.
– dx_over_dt
Jul 11 '18 at 21:20
...
Most useful NLog configurations [closed]
...on, perhaps I'm looking through the github examples in the wrong way? Who knows.
– JARRRRG
Oct 1 '14 at 11:42
How to u...
How to add System.Windows.Interactivity to project?
...her way to obtain System.Windows.Interactivity ? What should I do? (right now i don't have another computer so I can not just copy this library :)
...
Select parent element of known element in Selenium
...her icons and texts -->
<span>Close</span>
</a>
Now that you need to select parent tag 'a' based on <span> text, then use
driver.findElement(By.xpath("//a[.//span[text()='Close']]"));
Explanation: Select the node based on its child node's value
...
How do I discover memory usage of my application in Android?
...hat they actually mean that only results in a vague conclusion.)
Note: we now have much more extensive documentation on Managing Your App's Memory that covers much of the material here and is more up-to-date with the state of Android.
First thing is to probably read the last part of this article w...
How to stop app that node.js express 'npm start'
...(80, () => {
console.log('HTTP server listening on port 80');
});
// Now for the socket.io stuff - NOTE THIS IS A RESTFUL HTTP SERVER
// We are only using socket.io here to respond to the npmStop signal
// To support IPC (Inter Process Communication) AKA RPC (Remote P.C.)
const io = require('...