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How to run multiple .BAT files within a .BAT file
...iles, you could also use for to do this (it does not guarantee the correct order of batch file calls; it follows the order of the file system):
FOR %x IN (*.bat) DO call "%x"
You can also react on errorlevels after a call. Use:
exit /B 1 # Or any other integer value in 0..255
to give back an...
Count the occurrences of DISTINCT values
...a particular field, count the number of occurrences of that value and then order the results by the count.
3 Answers
...
C++ Singleton design pattern
...ingleton: How should it be used
See this two article about initialization order and how to cope:
Static variables initialisation order
Finding C++ static initialization order problems
See this article describing lifetimes:
What is the lifetime of a static variable in a C++ function?
See this ...
Case objects vs Enumerations in Scala
...
The other difference is that Enumeration enum is ordered out of the box, whereas case object based enum obviosly not
– om-nom-nom
Oct 18 '12 at 11:48
1
...
Way to go from recursion to iteration
... you have more than one recursive call inside and you want to preserve the order of the calls, you have to add them in the reverse order to the stack:
foo(first);
foo(second);
has to be replaced by
stack.push(second);
stack.push(first);
Edit: The article Stacks and Recursion Elimination (or Articl...
What are the underlying data structures used for Redis?
...ess just the top or bottom items, or when N is small.
Sets
Sets are an unordered data collection, so they are good every time you have a collection of items and it is very important to check for existence or size of the collection in a very fast way. Another cool thing about sets is support for pe...
DISTINCT for only one column
...ProductModel,
ROW_NUMBER() OVER(PARTITION BY Email ORDER BY ID DESC) rn
FROM Products
) a
WHERE rn = 1
EDIT:
Example using a where clause:
SELECT *
FROM (
SELECT ID,
Email,
...
Hidden Features of SQL Server
...
A less known TSQL technique for returning rows in random order:
-- Return rows in a random order
SELECT
SomeColumn
FROM
SomeTable
ORDER BY
CHECKSUM(NEWID())
share
...
Javascript Array.sort implementation?
...end + 1; i < high_start; i++) {
var element = a[i];
var order = comparefn(element, pivot);
if (order < 0) {
a[i] = a[low_end];
a[low_end] = element;
low_end++;
} else if (order > 0) {
do {
high_start--;
...
SQL - many-to-many table primary key
... a separate index on (col2,col1) will catch those cases where the opposite order would execute faster. The surrogate is a waste of space.
You won't need indexes on the individual columns since the table should only ever be used to join the two referenced tables together.
That comment you refer to ...