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What is the difference between a symbolic link and a hard link?
... myfile.txt
Create a hard link my-hard-link to the file myfile.txt, which means "create a file that should point to the same inode that myfile.txt points to":
$ ln myfile.txt my-hard-link
Create a soft link my-soft-link to the file myfile.txt, which means "create a file that should point to the f...
Why does Windows64 use a different calling convention from all other OSes on x86-64?
...those if you have options. Of the classical registers, due to the implicit meaning of RBP and RSP these aren't available, and RBX traditionally has a special use on UN*X (global offset table) which seemingly the AMD64 ABI designers didn't want to needlessly become incompatible with.
Ergo, the only c...
Javascript/jQuery: Set Values (Selection) in a multiple Select
...lue='" + e + "']").prop("selected", true);
});
Working Example http://jsfiddle.net/McddQ/1/
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Difference between java.io.PrintWriter and java.io.BufferedWriter?
... @TritonMan at some point it needs to interact with the OS, which means stepping outside of Java.
– TofuBeer
Oct 30 '16 at 7:01
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`date` command on OS X doesn't have ISO 8601 `-I` option?
... +00:00 are the same (mostly). For purposes of translating time, they both mean UTC. However England is +00:00 in winter and +01:00 in summer (BST).
– Jeffrey Hulten
May 10 '17 at 21:32
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Is there a print_r or var_dump equivalent in Ruby / Ruby on Rails?
...1
updated_at: 2009-05-26 22:46:29.501245
current_login_ip: 127.0.0.1
id: "1"
current_login_at: 2009-05-24 20:20:46.627254
login_count: "1"
last_login_ip:
last_login_at:
login: admin
attributes_cache: {}
=> nil
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If you want to just preview some string contents, try us...
When is TCP option SO_LINGER (0) required?
I think I understand the formal meaning of the option. In some legacy code I'm handling now, the option is used. The customer complains about RST as response to FIN from its side on connection close from its side.
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Rails 4 - Strong Parameters - Nested Objects
... the other hand if you want nested of multiple objects then you wrap it inside a hash… like this
params.require(:foo).permit(:bar, {:baz => [:x, :y]})
Rails actually have pretty good documentation on this: http://api.rubyonrails.org/classes/ActionController/Parameters.html#method-i-permit
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subtract two times in python
...
datetime.time does not support this, because it's nigh meaningless to subtract times in this manner. Use a full datetime.datetime if you want to do this.
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MongoDB with redis
...the collection level (to be used for purging data for instance).
Redis provides a convenient set datatype and its associated operations (union, intersection, difference on multiple sets, etc ...). It is quite easy to implement a basic faceted search or tagging engine on top of this feature, which is...