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java.util.regex - importance of Pattern.compile()?
... that all .NET Regex objects are cached, which is incorrect. Since .NET 2.0, automatic caching occurs only with static methods like Regex.Matches(), not when you call a Regex constructor directly. ref)
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How to install and run phpize
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For recent versions of Debian/Ubuntu (Debian 9+ or Ubuntu 16.04+) install the php-dev dependency package, which will automatically install the correct version of php{x}-dev for your distribution:
sudo apt install php-dev
Older versions of Debian/Ubuntu:
For PHP 5, it's in the php5-...
Generate JSON string from NSDictionary in iOS
...ions:(NSJSONWritingOptions) (prettyPrint ? NSJSONWritingPrettyPrinted : 0)
error:&error];
if (! jsonData) {
NSLog(@"%s: error: %@", __func__, error.localizedDescription);
return @"{}";
} else {
return [[NS...
How to pass parameters to the DbContext.Database.ExecuteSqlCommand method?
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edited Apr 30 '15 at 19:31
tomexou
33322 silver badges55 bronze badges
answered May 20 '11...
What is the difference between “instantiated” and “initialized”?
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answered Jul 10 '12 at 22:33
radarbobradarbob
4,46522 gold badges1919 silver badges2828 bronze badges
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std::string to char*
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700
It won't automatically convert (thank god). You'll have to use the method c_str() to get the C ...
Receive JSON POST with PHP
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501
Try;
$data = json_decode(file_get_contents('php://input'), true);
print_r($data);
echo $data["...
MySQL, better to insert NULL or empty string?
...re differences:
A LENGTH of NULL is NULL, a LENGTH of an empty string is 0.
NULLs are sorted before the empty strings.
COUNT(message) will count empty strings but not NULLs
You can search for an empty string using a bound variable but not for a NULL. This query:
SELECT *
FROM mytable
WHERE ...
Why does this iterative list-growing code give IndexError: list assignment index out of range?
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j is an empty list, but you're attempting to write to element [0] in the first iteration, which doesn't exist yet.
Try the following instead, to add a new element to the end of the list:
for l in i:
j.append(l)
Of course, you'd never do this in practice if all you wanted to do wa...
How do I look inside a Python object?
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360
Python has a strong set of introspection features.
Take a look at the following built-in funct...