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Array slicing in Ruby: explanation for illogical behaviour (taken from Rubykoans.com)
...s, so they are defined in such a way that the beginning and the end of the string have working zero-length expressions.
array[4, 0] = :sandwich
array[0, 0] = :crunchy
=> [:crunchy, :peanut, :butter, :and, :jelly, :sandwich]
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Parallel.ForEach vs Task.Run and Task.WhenAll
...combine both options by writing:
await Task.Run(() => Parallel.ForEach(strings, s =>
{
DoSomething(s);
}));
Note that this can also be written in this shorter form:
await Task.Run(() => Parallel.ForEach(strings, DoSomething));
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What's the difference between Spring Data's MongoTemplate and MongoRepository?
... changes.
Example: given a document like this: { _id: "ID1", field1: "a string", field2: 10.0 } and two different threads concurrently updating it...
With MongoTemplate it would look somewhat like this:
THREAD_001 THREAD_002
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javax.xml.bind.UnmarshalException: unexpected element (uri:“”, local:“Group”)
...hat.. Thanks alot mate.. :) . I just made the namespace mentioned to empty string.
– Arundev
Jun 13 '17 at 11:45
add a comment
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How can I pass a list as a command-line argument with argparse?
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What about a list of strings? This turns multiple string arguments ("wassup", "something", and "else")into a list of lists that looks like this: [['w', 'a', 's', 's', 'u', 'p'], ['s', 'o', 'm', 'e', 't', 'h', 'i', 'n', 'g'], ['e', 'l', 's', 'e']]...
How do I time a method's execution in Java?
...ises me that there's no spiffy built-in class, like Timer t = new Timer(); String s = t.getElapsed(format); etc...
– Ogre Psalm33
Oct 8 '08 at 12:48
18
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Is it unnecessary to put super() in constructor?
... public Derived(int i) { } }
Also fine.
public class Base { public Base(String s) { } }
public class Derived extends Base { }
The above is a compilation error as Base has no default constructor.
public class Base { private Base() { } }
public class Derived extends Base { }
This is also an er...
SQL Server dynamic PIVOT query?
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So \@cols must be string-concatenated, right? We can't use sp_executesql and parameter-binding to interpolate \@cols in there? Even though we construct \@cols ourself, what if somehow it contained malicious SQL. Any additional mitigating steps...
How can I check for NaN values?
... See docs.python.org/3/library/functions.html#float "If the argument is a string, it should contain a decimal number", or "Infinity" "inf" "nan"
– gimel
Nov 30 '16 at 6:19
40
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Appending an element to the end of a list in Scala
...e element is appended, and the ListBuffer converted back (pretty much like String and StringBuilder in Java), but that's just a guess.
– Landei
Aug 9 '13 at 9:27
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