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In Java, what does NaN mean?
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Minimal runnable example
The first thing that you have to know, is that the concept of NaN is implemented directly on the CPU hardware.
All major modern CPUs seem to follow IEEE 754 which specifies floating point formats, and NaNs, which are just special float values, are part of th...
How to get the index of an element in an IEnumerable?
... course, you'd have to rework the found==null condition (since found would now be a KVP value). Maybe using DefaultIfEmpty() or KVP<T, int?> (nullable index)
– kornman00
Jul 20 '14 at 10:59
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belongs_to through associations
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I'd like to know myself. Everything I tried fired 3 selects. You can specify a "-> { joins :something }" lambda on an association. The join is fired but subsequently another select anyway. I wasn't able to tune this up.
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INSERT IF NOT EXISTS ELSE UPDATE?
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It's valid if you know all the new value for all the fields. If the user update only, say, the Level, this approach cannot be followed.
– rds
Nov 14 '12 at 15:07
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How to make fill height
...e min-height: 1px; instead of height: 1px;
– Matt Leonowicz
Jun 6 '19 at 7:02
???? I am not sure whether I like CSS or...
How do I set the size of an HTML text box?
...="30" >Describe your project in detail.</textarea>
</div>
Now CSS code will be like:
.form textarea{
height: 220px;
width: 342px;
Problem solved.
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Change One Cell's Data in mysql
...swering the question for readers in the future, not just the person asking now! Please edit your answer to add explanation, and give an indication of what limitations and assumptions apply.
– Toby Speight
May 2 '17 at 8:54
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How to properly create an SVN tag from trunk?
... good practice. You want the branch to behave exactly like the trunk does now, and for that to happen you have to branch the entire trunk.
See a better summary of SVN usage at my blog: SVN Essentials, and SVN Essentials 2
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Best way to track onchange as-you-type in input type=“text”?
...eone.
So onkeyup is better for when you want to send what you just typed now.
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Why does 2 == [2] in JavaScript?
...a[array] it tries to turn the array into a number first, then string. Who knows?
var a = { "abc" : 1 };
a[["abc"]] === a["abc"];
In this example, you are creating an object called a with a member called abc. The right side of the equation is pretty simple; it is equivalent to a.abc. This returns ...