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How to Select Every Row Where Column Value is NOT Distinct
...o use Inner Join as a better option to this problem.
Considering the same table this could give the result
SELECT EmailAddress, CustomerName FROM Customers as a
Inner Join Customers as b on a.CustomerName <> b.CustomerName and a.EmailAddress = b.EmailAddress
For still better results I wou...
How to replace multiple strings in a file using PowerShell
...ign the output to a variable ($line) and then output the variable:
$lookupTable = @{
'something1' = 'something1aa'
'something2' = 'something2bb'
'something3' = 'something3cc'
'something4' = 'something4dd'
'something5' = 'something5dsf'
'something6' = 'something6dfsfds'
}
$o...
Practical usage of setjmp and longjmp in C
...r to free the memory. Also, this does not have so many blasted exceptions tables that all C++ compilers still generate 20 years after the fact.
– artless noise
Mar 10 '13 at 2:51
...
Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_
...itectural register operands onto physical registers. Presumably it needs a table of uop-code -> dependency pattern and port choices, and grouping all uops for the same execution unit together simplifies that table. That's what I meant in more detail.
– Peter Cordes
...
PHP & mySQL: Year 2038 Bug: What is it? How to solve it?
...b hardly a legacy platform yet.
Here is a process for altering a database table column to convert TIMESTAMP to DATETIME. It starts with creating a temporary column:
# rename the old TIMESTAMP field
ALTER TABLE `myTable` CHANGE `myTimestamp` `temp_myTimestamp` int(11) NOT NULL;
# create a new DAT...
How can I do test setup using the testing package in Go
...uages. Often, there's relatively fewer test functions, but each contains a table-driven set of test cases. See this article written by one of the Go team.
With a table-driven test, you simply put any setup code before the loop that executes the individual test-cases specified in the table, and put ...
Accessing Object Memory Address
...s have different kinds of id, but the most general is just an index into a table of objects you've called id on, which is obviously not going to be a pointer. I'm not sure about IronPython, but I'd suspect it's more like Jython than like CPython in this regard. So, in most Python implementations, th...
Secure hash and salt for PHP passwords
... etc, can actually reduce entropy by making the password scheme more predictable. I do agree. Randomess, as truly random as possible, is always the safest but least memorable solution.
So far as I've been able to tell, making the world's best password is a Catch-22. Either its not memorable, too pr...
Wrap a delegate in an IEqualityComparer
...ll of these rely on hash codes to work properly, because they utilize hash tables internally for efficiency.
Take Distinct, for example. Consider the implications of this extension method if all it utilized were an Equals method. How do you determine whether an item's already been scanned in a sequ...
Java and SQLite [closed]
...s test app will create a database file, send some SQL commands to create a table, store some data in the table, and read it back and display on console. It will create the test.db file in the root directory of the project. You can run this example with java -cp .:sqlitejdbc-v056.jar Test.
package ...