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How to process each line received as a result of grep command
...
One of the easy ways is not to store the output in a variable, but directly iterate over it with a while/read loop.
Something like:
grep xyz abc.txt | while read -r line ; do
echo "Processing $line"
# your code goes...
Why are my PowerShell scripts not running?
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This is a fairly terrifying answer. For one, it permanently changes Powershell's default security level in possibly undesirable (and insecure) ways. For another, it fails to even adequately explain that signed remote scripts and unsigned local scripts – but not u...
Why is typeof null “object”?
...atically "auto-boxed" in String, Number, and Boolean wrappers when you use one of the primitives with a property reference operator (. or [ ]).
– Pointy
Apr 24 '17 at 22:05
ad...
smart pointers (boost) explained
...t delete the object, because it doesn't own it. The second means that only one smart pointer can ever point to the same object at the same time. If the smart pointer is to be returned from functions, the ownership is transferred to the returned smart pointer, for example.
The third means that mult...
How do I represent a hextile/hex grid in memory?
...-dimensional array:
If
2
7 3
1
6 4
5
is the number one with its neighbors in the hex grid, then you can put this into a 2D array like so:
2 3
7 1 4
6 5
Obviously neighbor-ness is determined in this grid not only by being horizontally or vertically adjacent but also using...
how to install gcc on windows 7 machine?
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It is difficult and I find it above my level of understanding.
Could any one please provide me step by step guidance along with links?
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anchor jumping by using javascript
... or some transition
}
Demo: http://jsfiddle.net/DerekL/rEpPA/
Another one w/ transition: http://jsfiddle.net/DerekL/x3edvp4t/
You can also use .scrollIntoView:
document.getElementById(h).scrollIntoView(); //Even IE6 supports this
(Well I lied. It's not complicated at all.)
...
A non-blocking read on a subprocess.PIPE in Python
... and python will hang, even if the main thread exited, isn't it? how could one work around this? python 2.x doesn't support killing the threads, what's worse, doesn't support interrupting them. :( (obviously one should handle the exceptions to assure the subprocess is shut down, but just in case it ...
How to build a Debian/Ubuntu package from source?
...overwriting my custom package?
My knowledge might be out of date on this one, but to address both:
Use dpkg --set-selections. Assuming nullidentd was the package you wanted to stay put, run as root
echo 'nullidentd hold' | dpkg --set-selections
Alternately, since you are building from source, ...
How do you check if a certain index exists in a table?
...ore here: CREATE INDEX (Transact-SQL) - DROP_EXISTING Clause
N.B. As mentioned in the comments, the index must already exist for this clause to work without throwing an error.
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