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The performance impact of using instanceof in Java
...y "slow" operations, including instanceof, exception handling, reflection, etc.
As Donald Knuth wrote, "We should forget about small efficiencies, say about 97% of the time: premature optimization is the root of all evil." The performance of instanceof probably won't be an issue, so don't waste you...
When increasing the size of VARCHAR column on a large table could there be any problems?
...har(max) is not. Because varchar(max) values (aka BLOB values - image/text etc) are stored differently on the disk, not within a table row, but "out of row". So the server will go nuts on a big table and become unresponsive for minutes (hours).
--no downtime
ALTER TABLE MyTable ALTER COLUMN [MyColu...
Reliable method to get machine's MAC address in C#
...rkInterfaceType.Loopback); var sortedNetworks = activeNetworks.OrderByDescending(ni => ni.Speed); return sortedNetworks.First().GetPhysicalAddress().ToString();
– Graham Laight
Nov 22 '13 at 17:03
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How does this JavaScript/jQuery syntax work: (function( window, undefined ) { })(window)?
...variable name. When it's not found, JavaScript goes through the next scope etc. until it filters through the global variables. So if the window variable is made local, JavaScript can look it up quicker.
Further information: Speed Up Your JavaScript - Nicholas C. Zakas
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HTML/Javascript change div content
...event (an object that has event details such as name of the element, value etc..);
Step2: I extracted the value through event.target.value and then simple switch will give me freedom to add custom text.
Live Code
https://jsbin.com/poreway/edit?html,js,output
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Python 3.x rounding behavior
...context for the Decimal module that does this for you implicitly. See the setcontext() function.
– kindall
May 31 '12 at 21:04
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Is there an R function for finding the index of an element in a vector?
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I think it would be helpful to stress that the order of the arguments in match matters if you want the index of the first occurrence. For your example, match(x,c(4,8)) gives different results, which is not super obvious at first.
– apitsch
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How to get the result of OnPostExecute() to main activity because AsyncTask is a separate class?
... output, String response, and String result to different matching types in order to get different objects.
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java.lang.NoClassDefFoundError: Could not initialize class XXX
...likely the cause of the problem (maybe file can't be found, no permissions etc.).
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How to use sed/grep to extract text between two words?
...n the grep included in *BSD, or the ones that come with any SVR4 (Solaris, etc). In FreeBSD, you can install the devel/pcre port which includes pcregrep, which supports PCRE (and look-ahead/behind). Older versions of OSX used GNU grep, but in OSX Mavericks, -P is derived from FreeBSD's version, whi...