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How to test an SQL Update statement before running it?
... @rickozoe below:
In general these lines will not be executed as once. In PHP f.e. you would write something like that (perhaps a little bit cleaner, but wanted to answer quick ;-) ):
$MysqlConnection->query('START TRANSACTION;');
$erg = $MysqlConnection->query('UPDATE MyGuests SET lastname=...
What are the differences between a multidimensional array and an array of arrays in C#?
...which is the base address of the array.
A multidimensional array therefore allocates a continuous memory block, while a jagged array does not have to be square, e.g. jagged[1].Length does not have to equal jagged[2].Length, which would be true for any multidimensional array.
Performance
Performance ...
How to “warm-up” Entity Framework? When does it get “cold”?
... will die together with the AppDomain.
All in all you should make sure to allocate contexts frequently and use them only for a short time, that you can start your application quickly, that you compile queries that are rarely used and provide pregenerated views for queries that are performance criti...
What does ~~ (“double tilde”) do in Javascript?
...nd-about way.
See this thread: http://www.sitepoint.com/forums/showthread.php?t=663275
Also, more detailed info is available here: http://dreaminginjavascript.wordpress.com/2008/07/04/28/
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Why do == comparisons with Integer.valueOf(String) give different results for 127 and 128?
...ntegerCache.high (calculated at runtime with minimum value 127) then a pre-allocated (cached) object is returned. So when you use 127 as parameter, you're getting two references to same cached object and getting true in the comparison of the references.
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In JavaScript, why is “0” equal to false, but when tested by 'if' it is not false by itself?
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It's PHP where the string "0" is falsy (false-when-used-in-boolean-context). In JavaScript, all non-empty strings are truthy.
The trick is that == against a boolean doesn't evaluate in a boolean context, it converts to number, an...
When should a class be Comparable and/or Comparator?
...of the uses of both Comparator and comparable: sysdotoutdotprint.com/index.php/2017/03/28/…
– mel3kings
Mar 28 '17 at 3:49
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Stop form refreshing page on submit
... $.ajax({
type: 'post',
url: 'myPageName.php',
data: $('#myFormName').serialize(),
success: function () {
alert("Email has been sent!");
}
});
e.preventDefault();
});
})...
Browse the files created on a device by the iOS application I'm developing, on workstation?
...xport some app files! http://www.macroplant.com/iexplorer/download-ie3-mac.php
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For a boolean field, what is the naming convention for its getter/setter?
...r: http://martinfowler.com/bliki/FlagArgument.html
However, I come from a PHP background and see this trend being adopted more and more. Not sure how much this lives with Java development.
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