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Difference between reduce and foldLeft/fold in functional programming (particularly Scala and Scala
...ering.
If you have a look at the Spark documentation for reduce it specifically says "... commutative and associative binary operator"
http://spark.apache.org/docs/1.0.0/api/scala/index.html#org.apache.spark.rdd.RDD
Here is proof that reduce is NOT just a special case of foldLeft
scala> val i...
Why no ICloneable?
... that, your expectation is not the only possible idea people may have when calling or implementing Clone. What if library authors implementing some other list do not follow your expectation? The API should be trivially unambiguous, not arguably unambiguous.
– Andrey Shchekin
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COALESCE Function in TSQL
...cription of the details here
http://www.mssqltips.com/sqlservertip/2689/deciding-between-coalesce-and-isnull-in-sql-server/
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How do I get the last four characters from a string in C#?
... return source.Substring(source.Length - tail_length);
}
}
And then call:
string mystring = "34234234d124";
string res = mystring.GetLast(4);
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Pass parameters in setInterval function
Please advise how to pass parameters into a function called using setInterval .
15 Answers
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Using a strategy pattern and a command pattern
...ns encapsulate an algorithm and decouple implementation details from their calling classes. The only difference I can discern is that the Strategy pattern takes in parameters for execution, while the Command pattern doesn't.
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What are the best use cases for Akka framework [closed]
...not want to hang on one of its components because everything is implicitly called using synchronous methods, and that one component is locking on something. It is very stable and the let-it-crash + supervisor solution to failure really works well. Everything is easy to setup programmatically and not...
Stop jQuery .load response from being cached
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Love it! Now I don't have to use overly verbose .ajax calls and can use the shortcuts!
– Gattster
Jun 1 '11 at 1:05
1
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Convert objective-c typedef to its string equivalent
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@Christoph: Yes, that's a C99 feature called designated initializers. That's fine to use in Objective-C (which is based off of C99), but for generic C89 code, you can't use those.
– Adam Rosenfield
Sep 3 '13 at 17:55
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How can I get dict from sqlite query?
...e docs:
import sqlite3
def dict_factory(cursor, row):
d = {}
for idx, col in enumerate(cursor.description):
d[col[0]] = row[idx]
return d
con = sqlite3.connect(":memory:")
con.row_factory = dict_factory
cur = con.cursor()
cur.execute("select 1 as a")
print cur.fetchone()["a"]
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