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How to test an SQL Update statement before running it?
...verflow.com/a/18499823/1416909
):
# do some stuff that should be conditionally rollbacked later on
SET @v1 := UPDATE MyGuests SET lastname='Doe' WHERE id=2;
IF(v1 < 1) THEN
ROLLBACK;
ELSE
COMMIT;
END IF;
But I would suggest to use the language wrappers available in your favorite progr...
How to turn off the Eclipse code formatter for certain sections of Java code?
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Eclipse 3.6 allows you to turn off formatting by placing a special comment, like
// @formatter:off
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// @formatter:on
The on/off features have to be turned "on" in Eclipse preferences: Java > Code Style > Formatter. Click on ...
css 'pointer-events' property alternative for IE
...mp; there's always a lesson in haste makes waste. Besides, Mozilla said it all "Warning: The use of pointer-events in CSS for non-SVG elements is experimental. The feature used to be part of the CSS3 UI draft specification but, due to many open issues, has been postponed to CSS4."
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Better naming in Tuple classes than “Item1”, “Item2”
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It should be noted that C# 7's ValueTuple, while usually great, is a mutable value type (struct), while Tuple is an immutable reference type (class). As far as I know, there's no way to get a reference type Tuple with friendly item names.
– dx_over_dt
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How to check if a file contains a specific string using Bash
...xpected results. It's safer to always use fgrep (or grep -F) (unless you really need a regex, in which case egrep (or grep -E) is probably the best choice)
– Walter Tross
Apr 27 '18 at 13:25
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Multiple cases in switch statement
Is there a way to fall through multiple case statements without stating case value: repeatedly?
18 Answers
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Deleting array elements in JavaScript - delete vs splice
... myArray
[empty, "b", "c", "d"]
myArray.splice(start, deleteCount) actually removes the element, reindexes the array, and changes its length.
> myArray = ['a', 'b', 'c', 'd']
["a", "b", "c", "d"]
> myArray.splice(0, 2)
["a", "b"]
> myArray
["c", "d"]
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Getting ssh to execute a command in the background on target machine
...a race
condition [2]. This problem can also
be overcome by redirecting all three
I/O streams:
nohup myprogram > foo.out 2> foo.err < /dev/null &
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How do I select an entire row which has the largest ID in the table?
... said, I'm just guessing based on the name that it isn't. MySQL is historically known to have bad performance with subselects. That has vastly improved in newer versions though, so depends what version you're using. However, rethinking it, this particular query may be OK. Although running a query a ...
how do I use the grep --include option for multiple file types?
When I want to grep all the html files in some directory, I do the following
7 Answers
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