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PHP + MySQL transactions examples
...(mysql_error());
$query = "INSERT INTO employee (ssn,name,phone) values ('123-45-6789','Matt','1-800-555-1212')";
begin(); // transaction begins
$result = mysql_query($query);
if(!$result){
rollback(); // transaction rolls back
echo "transaction rolled back";
exit;
}else{
commit(...
Setting variable to NULL after free
...obal variables. Even for local variables, it may be a good approach if the function continues after the memory is released.
To complete the style, you should also initialize pointers to NULL before they get assigned a true pointer value.
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What is the correct way to document a **kwargs parameter?
...rgs argument, but a completely normal one.
– bugmenot123
Jul 15 '19 at 12:26
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decimal vs double! - Which one should I use and when? [duplicate]
...ut at 1 million for a float.
A 15 digit monetary value:
£1,234,567,890,123.45
9 trillion with a double. But with division and comparisons it's more complicated (I'm definitely no expert in floating point and irrational numbers - see Marc's point). Mixing decimals and doubles causes issues:
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How to call a parent method from child class in javascript?
...edited Aug 20 '15 at 1:09
Seanny123
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answered Aug 7 '12 at 22:29
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Why is lazy evaluation useful?
... they're not going to be used. For example, I may pass three values into a function, but depending on the sequence of conditional expressions, only a subset may actually be used. In a language like C, all three values would be computed anyway; but in Haskell, only the necessary values are computed.
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Do you use NULL or 0 (zero) for pointers in C++?
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123
There are a few arguments (one of which is relatively recent) which I believe contradict Bjarn...
Unable to open project… cannot be opened because the project file cannot be parsed
...t;< .mine , ============ and >>>>>>>>>> .r123. These are generally conflicts that arise when you take update from SVN.
Delete these and save file.
Now, you'll be able to open project without any error message.
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jQuery: what is the best way to restrict “number”-only input for textboxes? (allow decimal points)
...TheVillageIdiotTheVillageIdiot
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Quickest way to convert a base 10 number to any base in .NET?
...vert numbers to any base so you would have to write your own small utility function. A simple sample would look like that (note that this surely can be made faster by replacing the string concatenation):
class Program
{
static void Main(string[] args)
{
// convert to binary
...