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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 ...
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...
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 ...
Swift days between two NSDates
...onsider the time difference as well. For example if you compare the dates 2015-01-01 10:00 and 2015-01-02 09:00, days between those dates will return as 0 (zero) since the difference between those dates is less than 24 hours (it's 23 hours).
If your purpose is to get the exact day number between tw...
Convert PHP closing tag into comment
... you.
– v1n_vampire
Mar 5 '13 at 9:30
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I had to use this trick in C 2 days ago for a string cont...
Getting all types that implement an interface
... reflection, how can I get all types that implement an interface with C# 3.0/.NET 3.5 with the least code, and minimizing iterations?
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Maven Run Project
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edited Jun 20 '18 at 16:17
Nadjib Mami
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PHP - Check if two arrays are equal
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530
$arraysAreEqual = ($a == $b); // TRUE if $a and $b have the same key/value pairs.
$arraysAreEqua...
Why are there no ++ and -- operators in Python?
...ed as much as in other languages. You don't write things like for(int i = 0; i < 10; ++i) in Python very often; instead you do things like for i in range(0, 10).
Since it's not needed nearly as often, there's much less reason to give it its own special syntax; when you do need to increment, += ...