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How to show first commit by 'git log'?
...he earliest date in bar.git). At some point the developers of “bar” decide to incorporate libfoo into their project by using a subtree merge. Prior to this merge it might have been trivial to determine the “first” commit in bar.git (there was probably only one root commit). After the merge, ...
How does Java Garbage Collection work with Circular References?
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Java's GC considers objects "garbage" if they aren't reachable through a chain starting at a garbage collection root, so these objects will be collected. Even though objects may point to each other to form a cycle, they're still garbage i...
How to tell if JRE or JDK is installed
... @Pacerier You can edit / or make a entry if none found - inside your environmental variables.
– Maciej Cygan
Dec 11 '14 at 13:19
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?: operator (the 'Elvis operator') in PHP
...y is that this answer forms a recursive loop with the Wiki article, which didn't fully explain why it's called the "Elvis operator".
– seeming.amusing
Feb 24 '16 at 16:21
41
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What does __FILE__ mean in Ruby?
...9.2 and 1.9.3 appear to behave a little differently from what Luke Bayes said in his comment. With these files:
# test.rb
puts __FILE__
require './dir2/test.rb'
# dir2/test.rb
puts __FILE__
Running ruby test.rb will output
test.rb
/full/path/to/dir2/test.rb
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How do I automatically sort a has_many relationship in Rails?
...e adding a default order is cumbersome for some reason or you want to override your default in certain cases, it is trivial to specify it in the fetching action itself:
sorted = article.comments.order('created_at').all
sha...
Ruby: kind_of? vs. instance_of? vs. is_a?
...at's an interesting reason. can you break this, thouugh? like can you override kind_of? but not is_a??
– Claudiu
Oct 8 '10 at 19:38
3
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Python naming conventions for modules
...n naming conventions and other style advice, see PEP 8, the Python style guide.
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How to send only one UDP packet with netcat?
... might as well write
echo -n "hello" >/dev/udp/localhost/8000
and avoid all the idiosyncrasies and incompatibilities of netcat.
This also works sending to other hosts, ex:
echo -n "hello" >/dev/udp/remotehost/8000
These are not "real" devices on the file system, but bash "special" alias...
How can I detect if this dictionary key exists in C#?
...th contact data. I have the following code, which is functional , but not ideal:
5 Answers
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