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How do I get the first element from an IEnumerable in .net?
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Use FirstOrDefault or a foreach loop as already mentioned. Manually fetching an enumerator and calling Current should be avoided. foreach will dispose your enumerator for you if it implements IDisposable. When calling MoveNext and Current you have to dispose it manually (if aplicable).
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How to use a variable inside a regular expression?
...(TEXTO) + r"\b(?!\w)"
if re.search(my_regex, subject, re.IGNORECASE):
etc.
Note the use of re.escape so that if your text has special characters, they won't be interpreted as such.
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How to install therubyracer gem on 10.10 Yosemite?
...erubyracer
$ gem uninstall libv8
$ gem install therubyracer -v '0.12.0'
Fetching: libv8-3.16.14.7-x86_64-darwin-14.gem ( 57%)
Fetching: libv8-3.16.14.7-x86_64-darwin-14.gem (100%)
Successfully installed libv8-3.16.14.7-x86_64-darwin-14
Building native extensions. This could take a while...
Succes...
What is the best way to determine the number of days in a month with JavaScript?
...function daysInMonth (month, year) { // Use 1 for January, 2 for February, etc.
return new Date(year, month, 0).getDate();
}
console.log(daysInMonth(2, 1999)); // February in a non-leap year.
console.log(daysInMonth(2, 2000)); // February in a leap year.
Day 0 is the last day in the p...
Why can't I see the “Report Data” window when creating reports?
...how Data Sources" section brings the "Website Data Sources" section which fetches all Entities, Typed DataSets etc.
The keybord shortcut is (Shift+Alt+D).
The twisty part here is the "Data Sources" section available with the Server Explorer toolbar doesnt bring up any stuff but the "Website Data S...
Managing constructors with many parameters in Java
... .setZzz(myZzz)
// ... etc.
.build();
See page 8 and following of this Josh Bloch presentation (PDF), or this review of Effective Java
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How can I convert a Unix timestamp to DateTime and vice versa?
...seconds... A double is a floating number. The argument should be int/long/etc.
– ccook
Mar 4 '13 at 14:59
44
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How to ignore a property in class if null, using json.net
...mportant thing - it works only with the concrete classes (Person, Account, etc.). when I tried this with Dictionary, it didn't work
– chester89
Apr 15 '16 at 10:31
1
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How to prevent rm from reporting that a file was not found?
...s that the file exists and is a regular file (not a directory, device node etc...)
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How to escape os.system() calls?
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subprocess (especially with check_call etc) is often dramatically superior, but there are a few cases where shell escaping is still useful. The main one I'm running into is when I'm having to invoke ssh remote commands.
– Craig Ringer
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