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Generate a random alphanumeric string in Cocoa
...th is constant, the range of characters used is limited (0-9, A-F, - = 17, vs 62 for a-Z. 0-9). This string is unique but predictable.
– amcc
Jul 2 '15 at 11:16
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What does it mean by select 1 from table?
... is "more obvious" immediately. Of course, that might be a viscous chicken vs. egg issue, but I don't generally dwell)).
SELECT * FROM TABLE1 T1 WHERE EXISTS (
SELECT 1 FROM TABLE2 T2 WHERE T1.ID= T2.ID
);
Basically, the above will return everything from table 1 which has a corresponding I...
How to check if one of the following items is in a list?
...order that would yield faster performance? (i.e., x in long for x in short vs x in short for x in long)
– Luke Sapan
Feb 13 '14 at 18:08
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Check if event is triggered by a human
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You can use onmousedown to detect mouse click vs trigger() call.
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What is the best way to add options to a select from a JavaScript object with jQuery?
...ning you should avoid DOM updates in loops. jsperf.com/jquery-append-array-vs-string
– jthomas
Jun 3 '15 at 3:48
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Centering controls within a form in .NET (Winforms)? [duplicate]
... when resizing.
NOTE: Turning off anchoring via the properties window in VS2015 may require entering None, None (instead of default Top,Left)
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Check whether number is even or odd
...t it is inefficient. However, knowing beforehand that writing code one way vs. another way is more efficient, and choosing to use the more efficient code, is NOT premature optimization. It is your subjective opinion that n % 2 == 0 is cleaner than n & 1 == 0.
– crush
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Develop Android app using C#
...nch to learn; it is made by JetBrains and the intelli-sense is better than VS.
IDEA is free.
I have been a C# programmer for 12 years and started developing for Android with C# but ended up jumping ship and going the Java route. The languages are so similar you really won't notice much of a learni...
Gradient borders
...supported" would mean including support for IE10. See CanIUse border-image vs CanIUse Gradient.
– aug
Mar 20 '15 at 18:01
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Counting null and non-null values in a single query
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SQLServer uses an index scan for this query vs two index seeks using a union. On a table with 40.000 rows, there is no speed difference.
– Lieven Keersmaekers
Aug 13 '09 at 13:45
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