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What is the difference between ? and Object in Java generics?
... type of ?. Not everything matches Object, but everything matches ?.
int test1(List<?> l) {
return l.size();
}
int test2(List<Object> l) {
return l.size();
}
List<?> l1 = Lists.newArrayList();
List<Object> l2 = Lists.newArrayList();
test1(l1); // compiles because any...
What is the “right” way to iterate through an array in Ruby?
...e Range class to use it. If you can do this please let me know, otherwise confirmation of impossibility would be appreciated though it would be disappointing. Perhaps Ruby 1.9 addresses this.
(Thanks for your time in reading this.)
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Check if item is in an array / list
...or arrays.
for example say you have dataframe which has a column name ie, test['Name'], you can do
if name in test['Name'].values :
print(name)
for a normal list you dont have to use .values
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Disable assertions in Python
...
Call Python with the -O flag:
test.py:
assert(False)
print 'Done'
Output:
C:\temp\py>C:\Python26\python.exe test.py
Traceback (most recent call last):
File "test.py", line 1, in <module>
assert(False)
AssertionError
C:\temp\py>C:\Py...
Scaling Node.js
... connect-auth library. Then you are covered safe because they have experts testing there login-systems for holes and the also don't transmit passwords via plain-text but thank for god use https. I also have answered a topic for a user who wanted to use facebook-connect.
validation of input data
To...
How to find difference between two Joda-Time DateTimes in minutes
...t does (as JodaTime has the concept of LocalTime), but I would suggest you test it and see. The question would be though, in which time zone would the resulting value be represented in?
– MadProgrammer
Apr 21 '16 at 1:24
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How do I reflect over the members of dynamic object?
...meta object with an implementation of GetDynamicMemberNames without custom testing beyond is IDynamicMetaObjectProvider.
After getting the member names it's a little more work to get the value the right way, but Impromptu does this but it's harder to point to just the interesting bits and have it m...
How to serialize a lambda?
...rences. For example this code:
import java.io.Serializable;
public class Test {
static Object bar(String s) {
return "make serializable";
}
void m () {
SAM s1 = (SAM & Serializable) Test::bar;
SAM s2 = (SAM & Serializable) t -> "make serializable";
...
How do you use an identity file with rsync?
...z -e "ssh -p1234 -i /home/username/.ssh/1234-identity" dir user@server:
Tested with rsync 3.0.9 on Ubuntu
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Regular expression: find spaces (tabs/space) but not newlines
How can I have a regular expression that tests for spaces or tabs but not newlines. I tried \s but found out that it tests for newlines too.
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