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How to emulate C array initialization “int arr[] = { e1, e2, e3, … }” behaviour with std::array?
...ed.)
This question discusses the uses left for a C array like int arr[20]; . On his answer , @James Kanze shows one of the last strongholds of C arrays, it's unique initialization characteristics:
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Docker: adding a file from a parent directory
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231
You can build the Dockerfile from the parent directory:
docker build -t <some tag> -f &...
Append an object to a list in R in amortized constant time, O(1)?
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256
If it's a list of string, just use the c() function :
R> LL <- list(a="tom", b="dick")
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append new row to old csv file python
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258
with open('document.csv','a') as fd:
fd.write(myCsvRow)
Opening a file with the 'a' para...
Laravel Check If Related Model Exists
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202
In php 7.2+ you can't use count on the relation object, so there's no one-fits-all method for ...
@Basic(optional = false) vs @Column(nullable = false) in JPA
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2 Answers
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See changes to a specific file using git
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Use a command like:
git diff file_2.rb
See the git diff documentation for full information on the kinds of things you can get differences for.
Normally, git diff by itself shows all the changes in the whole repository (not just the current directory).
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Convert an ISO date to the date format yyyy-mm-dd in JavaScript
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Try this
date = new Date('2013-03-10T02:00:00Z');
date.getFullYear()+'-' + (date.getMonth()+1) + '-'+date.getDate();//prints expected format.
Update:-
As pointed out in comments, I am updating the answer to print leading zeros for date and month if...
find -exec cmd {} + vs | xargs
...n.
So your code should look like this:
find . -exec cmd -option1 -option2 -- {} +
or
find . -print0 | xargs -0 cmd -option1 -option2 --
The first version is shorter and easier to write as you can ignore 1, but
the second version is more portable and safe, as "-exec cmd {} +" is a relatively...