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How do I install Python packages on Windows?
...
@delinco m **module-name**: Searches **sys.path** for the named module and runs the corresponding **.py** file as a script..
– phil294
Jun 16 '18 at 11:52
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SQL NVARCHAR and VARCHAR Limits
...sult will be typed as nvarchar(max).
nvarchar(max) + varchar(n) will first convert the varchar(n) input to nvarchar(n) and then do the concatenation. If the length of the varchar(n) string is greater than 4,000 characters the cast will be to nvarchar(4000) and truncation will occur.
Datatypes of s...
How to remove trailing whitespaces with sed?
... sed v4.4):
sed -Ei 's/[ \t]+$//' "$1"
real 0m0,335s
user 0m0,133s
sys 0m0,193s
sed -Ei 's/[[:space:]]+$//' "$1"
rea
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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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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Unexpected Caching of AJAX results in IE8
...d Microsoft service proxy its not as simple to solve.
The trick is to use Sys.Net.WebRequestManager.add_invokingRequest method in the event handler change the request url:
networkRequestEventArgs._webRequest._url = networkRequestEventArgs._webRequest._url + '&nocache=' + new Date().getMillisec...
How to analyze a java thread dump?
...ead dump. A Java thread is implemented by a native thread of the operating system. Each thread is represented by a line in bold such as:
"Thread-1" (TID:0x9017A0, sys_thread_t:0x23EAC8, state:R, native ID:0x6E4) prio=5
*The following 6 items explains this as I've matched them from the ...
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....
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...
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)...