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What happens to an open file handle on Linux if the pointed file gets moved or deleted
...es sense as it doesn't necessarily delete the file - just removes the link from the directory.
If on the other hand the underlying device disappears (e.g. USB unplug) then the file handle won't be valid any more and is likely to give IO/error on any operation. You still have to close it though. T...
How to get the first line of a file in a bash script?
...
head takes the first lines from a file, and the -n parameter can be used to specify how many lines should be extracted:
line=$(head -n 1 filename)
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Facebook Graph API, how to get users email?
...ngeCallback(response);
});
}
Step 2: Let you get the response data from the status
function statusChangeCallback(response) {
// body...
if(response.status === 'connected'){
// setElements(true);
let userId = response.authResponse.userID;
// console.log(userId);
...
What is the Ruby (spaceship) operator?
...,2] <=> [2,2,2]
Ruby will start comparing each element of both array from left hand side.
1 for left array is smaller than 2 of right array. Hence left array is smaller than right array. Output will be -1.
[2,3,2] <=> [2,2,2]
As above it will first compare first element which are equal ...
how to change default python version?
...dmin 13964 Feb 20 11:14 pythonw3.2-32*
If you also installed a Python 2 from python.org, it would have a similar framework bin directory with no overlapping file names (except for 2to3).
$ open /Applications/Python\ 2.7/Update\ Shell\ Profile.command
$ sh -l
$ echo $PATH
/Library/Frameworks/Pyth...
.gitignore exclude folder but include specific subfolder
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Commit 59856de from Karsten Blees (kblees) for Git 1.9/2.0 (Q1 2014) clarifies that case:
gitignore.txt: clarify recursive nature of excluded directories
An optional prefix "!" which negates the pattern; any matching file excluded by a...
Is there such a thing as min-font-size and max-font-size?
...g in making a media query for every step we eant in our css, changing font from a fixed amount to another fixed amount. It works, but it is very boring to do, and you don't have a smooth linear aspect.
2) As AlmostPitt explained, there is a brillant solution for the minima :
font-size: calc(7px ...
Meaning of Open hashing and Closed hashing
...instead once an object is hashed, it is stored in a list which is separate from the hash table's internal array. "open" refers to the freedom we get by leaving the hash table, and using a separate list. By the way, "separate list" hints at why open hashing is also known as "separate chaining".
In s...
Exclude all transitive dependencies of a single dependency
...er Maven 3.1, the <configuration> is ignored when executing the goal from the command-line and must be moved up directly under <plugin>.
– David Harkness
Jul 10 '14 at 0:13
...
Best way to trim strings after data entry. Should I create a custom model binder?
... == typeof(NoTrimAttribute)))
and you can mark properties to be excluded from trimming with [NoTrim] attribute.
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