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Set focus on TextBox in WPF from view model

...ree parts. I'm wondering what is "cs.txtCompanyID" in your example? Is it a TextBox control? If yes, then you are on a wrong way. Generally speaking it's not a good idea to have any reference to UI in your ViewModel. You can ask "Why?" but this is another question to post on Stackoverflow :). Th...
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What is the correct way to represent null XML elements?

... NULL value is returned. xsi:nil is also used to indicate a valid element with no content even if that elements content type normally doesn't allow empty elements. If an empty tag is used, getElementValue() returns the empty string ("") If the tag is omitted, then no author tag is even present. Thi...
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Java's L number (long) specification

It appears that when you type in a number in Java, the compiler automatically reads it as an integer, which is why when you type in (long) 6000000000 (not in integer's range) it will complain that 6000000000 is not an integer. To correct this, I had to specify 6000000000L . I just learned abo...
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How to disable scrolling temporarily?

I'm using the scrollTo jQuery plugin and would like to know if it is somehow possible to temporarily disable scrolling on the window element through Javascript? The reason I'd like to disable scrolling is that when you scroll while scrollTo is animating, it gets really ugly ;) ...
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Why do most fields (class members) in Android tutorial start with `m`?

I know about camel case rules, but I'm confused with this m rule. What does it stand for? I'm a PHP developer. "We" use first letters of variables as indication of type, like 'b' for boolean, 'i' for integer and so on. ...
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How to ignore HTML element from tabindex?

...ion. Watch out though that this is a HTML5 feature and might not work with old browsers. To be W3C HTML 4.01 standard (from 1999) compliant, tabindex would need to be positive. Sample usage below in pure HTML. <input /> <input tabindex="-1" placeholder="NoTabIndex" /> <i...
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Why does this loop produce “warning: iteration 3u invokes undefined behavior” and output more than 4

...ned behaviour. And this means anything can happen, and discussing why does it happen under the rules of C++ doesn't make sense. C++11 draft N3337: §5.4:1 If during the evaluation of an expression, the result is not mathematically defined or not in the range of representable values for its t...
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Purpose of memory alignment

Admittedly I don't get it. Say you have a memory with a memory word of length of 1 byte. Why can't you access a 4 byte long variable in a single memory access on an unaligned address(i.e. not divisible by 4), as it's the case with aligned addresses? ...
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How to check if DST (Daylight Saving Time) is in effect, and if so, the offset?

This is a bit of my JS code for which this is needed: 14 Answers 14 ...
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IF… OR IF… in a windows batch file

Is there a way to write an IF OR IF conditional statement in a windows batch-file? 14 Answers ...