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How to concatenate two IEnumerable into a new IEnumerable?
...erator will attempt to use the two passed-in enumerable items (call them A and B) in sequence. If the passed-in enumerables represent sequences which will not change during the lifetime of Cat, and which can be read from without side-effects, then Cat may be used directly. Otherwise, it may be a g...
How to generate random number in Bash?
How to generate a random number within a range in Bash?
17 Answers
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Get keys from HashMap in Java
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team1.put("foo", 1);
team1.put("bar", 2);
will store 1 with key "foo" and 2 with key "bar". To iterate over all the keys:
for ( String key : team1.keySet() ) {
System.out.println( key );
}
will print "foo" and "bar".
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how to generate migration to make references polymorphic
I have a Products table and want to add a column:
4 Answers
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How to populate/instantiate a C# array with a single value?
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i++ copies i, increments i, and returns the original value. ++i just returns the incremented value. Therefore ++i is faster, which can be significant in large loops like we're talking about here.
– tenpn
Nov 8 '12 ...
How to get everything after a certain character?
I've got a string and I'd like to get everything after a certain value. The string always starts off with a set of numbers and then an underscore. I'd like to get the rest of the string after the underscore. So for example if I have the following strings and what I'd like returned:
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Check variable equality against a list of values
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You could use an array and indexOf:
if ([1,3,12].indexOf(foo) > -1)
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Unpacking, extended unpacking and nested extended unpacking
...lain with a few examples. Since you're talking about evaluating these "by hand," I'll suggest some simple substitution rules. Basically, you might find it easier to understand an expression if all the iterables are formatted in the same way.
For the purposes of unpacking only, the following substit...
ValueError : I/O operation on closed file
Here, p is a dictionary, w and c both are strings.
2 Answers
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How can I view all historical changes to a file in SVN
...'d like is a diff for every revision that changed the file. Is such a command available?
9 Answers
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