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In bash, how does one clear the current input?
...e cursor's position.
(In Cygwin, this will clear the input up to the next word. Words are separated by spaces, underscores, ...)
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Using scp to copy a file to Amazon EC2 instance?
...irectory is your target destination, don't use server name there. In other words, you don't need to mention machine name for the machine you're currently in.
scp -i /path/to/your/.pemkey -r /copy/from/path user@server:/copy/to/path
-r if it's a directory.
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What is the difference between concurrency, parallelism and asynchronous methods?
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While the two words are very similar and could be confused (and often are), they do have different definitions: Concurrent = Existing, happening, or done at the same time. Parallel = of or pertaining to the apparent or actual performance o...
How to replace captured groups only?
...et assigned a base-1 index, accessible in a replace with a $, so the first word (\w+) is in a group, and becomes $1, the middle part (\d+) is the second group, (but gets ignored in the replace), and the third group is $3. So when you give the replace string of "$1!new_ID!$3", the $1 and $3 are repla...
What's the difference between a proxy server and a reverse proxy server? [closed]
...but perhaps too terse.
I will try to add some examples.
First of all, the word "proxy" describes someone or something acting on behalf of someone else.
In the computer realm, we are talking about one server acting on the behalf of another computer.
For the purposes of accessibility, I will limit ...
Why is whitespace sometimes needed around metacharacters?
...her hand, curly braces ({ and }) are just ordinary characters that make up words.
Omitting the second space before } will do, since & is a metacharacter. Therefore, your tattoo should have at least one space character.
:(){ :|:&};:
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What does the ng stand for in Angular.js directives
... ngee. But we don't have to compare the pronunciations of NG with the full word Angular. NG is more of an abbreviation. So even if we drop the first A and try to pronounce Ngular it'll still sound like Angular only. So they took the starting fragment NG of the word Ngular to create an abbreviation w...
Why both no-cache and no-store should be used in HTTP response?
...the no-store header stopped it doing so. But if you take the W3C at their word, there's actually no way to control this behavior:
History buffers MAY store such responses as part of their normal operation.
General differences between browser history and the normal HTTP caching are described i...
Regular Expression: Any character that is NOT a letter or number
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\w is for Word characters and is exactly the same as [a-zA-Z0-9_] (notice that underscore is considered a word character.) ...so the shorthand would be str.replace(/[^\w]/g, ' ')
– Joel Mellon
Aug...
What is “lifting” in Haskell?
... ignorant about monads, too :) Or can someone explain it to me with simple words?
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