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Case preserving substitute in Vim
...OOD' : 'ood' )
Apart from the search pattern, you have to edit the four 'strings' in the replacement code: Edit the parts in bold:
:%s/\cbad\zejob/\=
( submatch(0)[0] is# toupper(submatch(0)[0]) ? 'G' : 'g' ) .
( submatch(0)[1] is# toupper(submatch(0)[1]) ? 'OOD' : 'ood' )
Don't use th...
Uncatchable ChuckNorrisException
...ang.VerifyError: (class: TestThrow, method: ma\
in signature: ([Ljava/lang/String;)V) Can only throw Throwable objects
Could not find the main class: TestThrow. Program will exit.
UPDATE 2:
Actually, you can get this to work if you disable the byte code verifier! (-Xverify:none)
UPDATE 3:
For ...
Runtime vs. Compile time
...ink of it in terms of errors, and when they can be caught.
Compile time:
string my_value = Console.ReadLine();
int i = my_value;
A string value can't be assigned a variable of type int, so the compiler knows for sure at compile time that this code has a problem
Run time:
string my_value = Cons...
Java SimpleDateFormat(“yyyy-MM-dd'T'HH:mm:ss'Z'”) gives timezone as IST
...without the quotes. Moreover you need to specify the timezone in the input string.
Example : 2013-09-29T18:46:19-0700
And the format as "yyyy-MM-dd'T'HH:mm:ssZ"
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...
Query an XDocument for elements by name at any depth
...
using System.Xml.Linq;
class Test
{
static void Main()
{
string xml = @"
<root>
<child id='1'/>
<child id='2'>
<grandchild id='3' />
<grandchild id='4' />
</child>
</root>";
XDocument doc = XDocument.Parse(xml);
...
Read-only list or unmodifiable list in .NET 4.0
...oking for ReadOnlyCollection, which has been around since .NET2.
IList<string> foo = ...;
// ...
ReadOnlyCollection<string> bar = new ReadOnlyCollection<string>(foo);
or
List<string> foo = ...;
// ...
ReadOnlyCollection<string> bar = foo.AsReadOnly();
This creates...
Why do we usually use || over |? What is the difference?
...nd Peter mentioned, for short-circuiting is the null reference check:
if(string != null && string.isEmpty())
{
//we check for string being null before calling isEmpty()
}
more info
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How to match “anything up until this sequence of characters” in a regular expression?
...n: /^[^abc]/ . This will match any single character at the beginning of a string, except a, b, or c.
12 Answers
...
Rails Root directory path?
... 3 and newer:
Rails.root
which returns a Pathname object. If you want a string you have to add .to_s. If you want another path in your Rails app, you can use join like this:
Rails.root.join('app', 'assets', 'images', 'logo.png')
In Rails 2 you can use the RAILS_ROOT constant, which is a string...
Python regular expressions return true/false
...
re.match(...) would return true if the string's beginning part match the regular pattern. While search will confirm the pattern anywhere in the string.
– Yu Shen
Jun 8 '13 at 9:57
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