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Glorified classes in the Java language
...icket of code that was originally written with xdoclet processing and then converted to annotations. Oh, how I prefer annotations to that (even though, with suitable maven incantations, the net effect is the same).
– Donal Fellows
Aug 14 '10 at 15:50
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SQL Server Linked Server Example Query
...inked before executing the query!
To check for linked servers call:
EXEC sys.sp_linkedservers
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What's the canonical way to check for type in Python?
...ve an object or an array of objects, and I use type-checking internally to convert a single object to a one-element list.
– sastanin
Jan 12 '09 at 11:21
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How to normalize a NumPy array to within a certain range?
...performed.
If they are not already of floating-point dtype, you'll need to convert them using astype. For example,
image = image.astype('float64')
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Best way to store time (hh:mm) in a database
.... Why spend extra time writing code that loads an int, manipulates it, and converts it into a datetime, when you could just load a datetime?
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Grunt watch error - Waiting…Fatal error: watch ENOSPC
...below command.
echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p
For Arch Linux add this line to /etc/sysctl.d/99-sysctl.conf:
fs.inotify.max_user_watches=524288
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In C#, why is String a reference type that behaves like a value type?
...rence, rather than primitive, type. Plus, if string were a value type then converting it to object would require it to be boxed, a needless inefficiency).
– Qwertie
Jun 25 '10 at 15:50
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Summarizing multiple columns with dplyr? [duplicate]
...le(1:5, 10, replace=T),
grp = sample(1:3, 10, replace=T))
# Convert to tidy format using gather
df %>%
gather(key = variable, value = value, a:d) %>%
group_by(grp, variable) %>%
summarize(mean = mean(value)) %>%
spread(variable, mean)
#> Source: local da...
Java 256-bit AES Password-Based Encryption
...ecretKey secret = null;
// since we pass it as a string of input, convert to a actual byte buffer here
mSalt = Hex.decodeHex (salt.toCharArray ());
Db ("got salt " + Hex.encodeHexString (mSalt));
// get initialization vector from passed string
mInitVec = Hex....
When should I use Struct vs. OpenStruct?
... = 2;
Here are some common use cases.
OpenStructs can be used to easily convert hashes to one-off objects which respond to all the hash keys.
h = { a: 1, b: 2 }
o = OpenStruct.new(h)
o.a = 1
o.b = 2
Structs can be useful for shorthand class definitions.
class MyClass < Struct.new(:a,:b,:c)...