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What is the difference between HTTP status code 200 (cache) vs status code 304?
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The items with code "200 (cache)" were fulfilled directly from your browser cache, meaning that the original requests for the items were returned with headers indicating that the browser could cache them (e.g. future-dated Expires or Cache-Contro...
Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
...ing when I do micro-optimizations (unrelated to stack
alignment) on C or C++ source codes?
Simply by telling gcc to do the right alignment:
g++ -O2 -falign-functions=16 -falign-loops=16
Long answer:
The code will run slower if:
an XX byte boundary cuts add() in the middle (XX being machin...
Convert an image to grayscale in HTML/CSS
... grayscale(0);
filter: none;
}
<img src="http://lorempixel.com/400/200/">
What about Internet Explorer 10?
You can use a polyfill like gray.
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How to run two jQuery animations simultaneously?
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yes there is!
$(function () {
$("#first").animate({
width: '200px'
}, { duration: 200, queue: false });
$("#second").animate({
width: '600px'
}, { duration: 200, queue: false });
});
share...
JRE 1.7 - java version - returns: java/lang/NoClassDefFoundError: java/lang/Object
...JRE is structured differently. rt.jar and friends no longer exist, and Pack200 is no longer used.
The Java standard library is contained in various JARs, such as rt.jar, deploy.jar, jsse.jar, etc. When the JRE is packaged, these critical JAR files are compressed with Pack200 and stored as rt.pack,...
Simple Digit Recognition OCR in OpenCV-Python
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For those who interested in C++ code can refer below code.
Thanks Abid Rahman for the nice explanation.
The procedure is same as above but, the contour finding uses only first hierarchy level contour, so that the algorithm uses only outer contour fo...
In jQuery how can I set “top,left” properties of an element with position values relative to the par
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$("#mydiv").parent().css({position: 'relative'});
$("#mydiv").css({top: 200, left: 200, position:'absolute'});
This works because position: absolute; positions relatively to the closest positioned parent (i.e., the closest parent with any position property other than the default static).
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How to change string into QString?
...to have trouble. In creates an unnecessary dependency between QT and libstdc++ that exists nowhere else in QT.
– shoosh
Sep 12 '13 at 20:16
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Can I use the range operator with if statement in Swift?
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You can use the "pattern-match" operator ~=:
if 200 ... 299 ~= statusCode {
print("success")
}
Or a switch-statement with an expression pattern (which uses the pattern-match
operator internally):
switch statusCode {
case 200 ... 299:
print("success")
default:
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How to alter SQL in “Edit Top 200 Rows” in SSMS 2008
In SQL Server 2008 Management Studio, when I right click on a database table and choose " Select Top 100 Rows ", I can then e.g. easily add a "ORDER BY " statement to the SQL. That works fine .
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