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Open existing file, append a single line
...xtWriter tw = new StreamWriter("file.txt");
//Write to file
tw.WriteLine("test info");
//Close File
tw.Close();
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Which iomanip manipulators are 'sticky'?
...o the stream. Unfortunately this does not preclude them from being sticky. Tests indicate that all of them except setw are sticky.
setiosflags: Sticky
resetiosflags:Sticky
setbase: Sticky
setfill: Sticky
setprecision: Sticky
All the other manipulators return a stream object. Thus any s...
When to use nil, blank, empty? [duplicate]
...
I found a good explanation here:
nil? tests whether the object is
exactly nil, that is whether it is the
one and only want instance of
NilClass.
empty? is a method some objects
respond to. You need to check the
documentation for each case. For
ex...
Technically what is the main difference between Oracle JDK and OpenJDK? [duplicate]
...mercial software I would suggest to go for Oracle JDK, as it is thoroughly tested and stable.
I have faced lot of problems with application crashes using OpenJDK, which are fixed just by switching to Oracle JDK
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What are the most widely used C++ vector/matrix math/linear algebra libraries, and their cost and be
...nefits: Very complete numeric library. Very, very fast (supposedly the fastest solver). By far the largest, most complete mathematical API. Commercially supported, mature, and stable.
Downsides: Cost - not inexpensive. Very few geometric/rendering specific methods, so you'll need to roll your o...
Difference between window.location.href, window.location.replace and window.location.assign
...nction for a side effect is more readable. Also you can easily mock it for testing.
– Mohamed Ramrami
Sep 14 at 15:08
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Delete all Duplicate Rows except for One in MySQL? [duplicate]
...n your connection for a large table.
NB - You need to do this first on a test copy of your table!
When I did it, I found that unless I also included AND n1.id <> n2.id, it deleted every row in the table.
If you want to keep the row with the lowest id value:
DELETE n1 FROM names n1, nam...
Detect if an element is visible with jQuery [duplicate]
...r to use jQuery considering you're using it in other places anyway:
if($('#testElement').is(':visible')) {
// Code
}
It is important to note that if any one of a target element's parent elements are hidden, then .is(':visible') on the child will return false (which makes sense).
jQuery 3
:visib...
Git command to display HEAD commit id?
...f5ad6286e176fc (tag: v1.0) second
52c1cdcb1988d638ec9e05a291e137912b56b3af test
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HTML Script tag: type or language (or omit both)?
...ml:lang="en" lang="en">
<head>
<script src="http://example.com/test.js"></script>
</head>
<body/>
</html>
You will be informed of the following error:
Line 4, Column 41: required attribute "type" not specified
So if you're a fan of standards, use it. It...