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What is the difference between “#!/usr/bin/env bash” and “#!/usr/bin/bash”?
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Running a command through /usr/bin/env has the benefit of looking for whatever the default version of the program is in your current environment.
This way, you don't have to look for it in a specific place on the system, as those paths ma...
Surrogate vs. natural/business keys [closed]
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Both. Have your cake and eat it.
Remember there is nothing special about a primary key, except that it is labelled as such. It is nothing more than a NOT NULL UNIQUE constraint, and a table can have more than one.
If you use a surrogate key, y...
How to bind 'touchstart' and 'click' events but not respond to both?
...t to mousedown... maybe the long delay is the difference between mousedown and mouseup which is how a click is determined.
– Mottie
Aug 11 '11 at 0:38
7
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Set breakpoint in C or C++ code programmatically for gdb on Linux
... I don't know other debuggers, but gdb is pretty flexible about signal handling.
– Cascabel
Dec 1 '10 at 16:25
4
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Overriding superclass property with different type in Swift
...properties. Instead you can create an extra variable in the subclass that handles the new class type:
class Chassis {}
class RacingChassis : Chassis {}
class Car {
var chassis = Chassis()
}
class RaceCar: Car {
var racingChassis = RacingChassis()
override var chassis: Chassis {
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How can I change my default database in SQL Server without using MS SQL Server Management Studio?
...r Management Studio by using the 'options' button in the connection dialog and selecting 'master' as the database to connect to. However, whenever I try to do anything in object explorer, it tries to connect using my default database and fails.
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Difference between Dictionary and Hashtable [duplicate]
What is the difference between Dictionary and Hashtable. How to decide which one to use?
7 Answers
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Static table view outside UITableViewController
After the new Xcode update, my app doesn't validate and shows this error:
4 Answers
4
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html5 - canvas element - Multiple layers
...ver, you could layer multiple <canvas> elements on top of each other and accomplish something similar.
<div style="position: relative;">
<canvas id="layer1" width="100" height="100"
style="position: absolute; left: 0; top: 0; z-index: 0;"></canvas>
<canvas id="layer...
SQL update trigger only when column is modified
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You have two way for your question :
1- Use Update Command in your Trigger.
ALTER TRIGGER [dbo].[tr_SCHEDULE_Modified]
ON [dbo].[SCHEDULE]
AFTER UPDATE
AS BEGIN
SET NOCOUNT ON;
IF UPDATE (QtyToRepair)
BEGIN
UPDATE SCHEDULE
SET modified = GETDA...