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In PHP, how do you change the key of an array element?
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Also this would presumably change the order of the array, which you may need to be careful of. Even associative arrays in PHP are ordered, and sometimes that order is leveraged.
– Robin Winslow
Feb 9 '12 at 17:14
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Why does the order of the loops affect performance when iterating over a 2D array?
... x[1][0] etc...
Meaning that you're hitting them all in order. Now look at the 1st version. You're doing:
x[0][0]
x[1][0]
x[2][0]
x[0][1]
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Using Excel OleDb to get sheet names IN SHEET ORDER
...in the forums said
I am afraid that OLEDB does not preserve the sheet order as they were in Excel
Excel Sheet Names in Sheet Order
Seems like this would be a common enough requirement that there would be a decent workaround.
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Why does this Java program terminate despite that apparently it shouldn't (and didn't)?
...ur object is not safely published those 4 write operations can be freely reordered by the compiler / JVM.
So from the perspective of the reading thread, it is a legal execution to read x with its new value but y with its default value of 0 for example. By the time you reach the println statement (w...
gcc warning" 'will be initialized after'
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Make sure the members appear in the initializer list in the same order as they appear in the class
Class C {
int a;
int b;
C():b(1),a(2){} //warning, should be C():a(2),b(1)
}
or you can turn -Wno-reorder
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How do I return rows with a specific value first?
..., Oracle, DB2, and many other database systems, this is what you can use:
ORDER BY CASE WHEN city = 'New York' THEN 1 ELSE 2 END, city
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How can I combine multiple rows into a comma-delimited list in Oracle? [duplicate]
..._name , ','), 2) csv
FROM (SELECT country_name , ROW_NUMBER () OVER (ORDER BY country_name ) rn,
COUNT (*) OVER () cnt
FROM countries)
WHERE rn = cnt
START WITH rn = 1
CONNECT BY rn = PRIOR rn + 1;
CSV ...
Linq to Sql: Multiple left outer joins
...be cleaner (you dont need all the into statements):
var query =
from order in dc.Orders
from vendor
in dc.Vendors
.Where(v => v.Id == order.VendorId)
.DefaultIfEmpty()
from status
in dc.Status
.Where(s => s.Id == order.StatusId)
.DefaultI...
For i = 0, why is (i += i++) equal to 0?
...d value of x becomes the result of the operation.
Note that due to order of precedence, the postfix ++ occurs before +=, but the result ends up being unused (as the previous value of i is used).
A more thorough decomposition of i += i++ to the parts it is made of requires one to know that...
For-each over an array in JavaScript
...k (not used above). The callback is called for each entry in the array, in order, skipping non-existent entries in sparse arrays. Although I only used one argument above, the callback is called with three: The value of each entry, the index of that entry, and a reference to the array you're iteratin...