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How was the first compiler written?
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Assembly instructions are (generally) a direct mapping to opcodes, which are (multi-)byte values of machine code that can be directly interpreted by the processor. It is quite possible to write a program in opcodes directly by looking them up from a table (...
Converting Stream to String and back…what are we missing?
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@Mortennobel ToArray() allocates a new array in memory and copies data over from the buffer, which may have serious implications if you're dealing with a lot of data.
– Levi Botelho
Apr 28 '19 at 21:01
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Programmatically Lighten or Darken a hex color (or rgb, and blend colors)
Here is a function I was working on to programmatically lighten or darken a hex color by a specific amount. Just pass in a string like "3F6D2A" for the color ( col ) and a base10 integer ( amt ) for the amount to lighten or darken. To darken, pass in a negative number (i.e. -20 ).
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JavaScript inheritance: Object.create vs new
...e mentioned that Both examples seem to do the same thing, It's not true at all, because
Your first example
function SomeBaseClass(){...}
SomeBaseClass.prototype = {
doThis : function(){...},
doThat : function(){...}
}
function MyClass(){...}
MyClass.prototype = Object.create(SomeBaseClass....
How do I clear a search box with an 'x' in bootstrap 3?
...efox users could instead select the text and press delete, or...
If you really need this nice-to-have feature supported in Firefox, then you could implement one of the other solutions posted here as a polyfill for input[type=search] elements. A polyfill is code that automatically adds a standard br...
boundingRectWithSize for NSAttributedString returning wrong size
...ng to get the rect for an attributed string, but the boundingRectWithSize call is not respecting the size I pass in and is returning a rect with a single line height as opposed to a large height (it is a long string). I have experimented by passing in a very large value for the height and also 0 as ...
Exception.Message vs Exception.ToString()
...ntaining the exception type, the message (from before), a stack trace, and all of these things again for nested/inner exceptions. More precisely, the method returns the following:
ToString returns a representation of the current exception that is intended to be understood by humans. Where the excep...
Thread context switch Vs. process context switch
...that a context switch messes with the processors cacheing mechanisms. Basically, when you context switch, all of the memory addresses that the processor "remembers" in its cache effectively become useless. The one big distinction here is that when you change virtual memory spaces, the processor's Tr...
What does @hide mean in the Android source code?
...);
}
return PackageManager.PERMISSION_DENIED;
}
However, we can call it by reflection:
Class c;
c = Class.forName("android.app.ActivityManager");
Method m = c.getMethod("checkUidPermission", new Class[] {String.class, int.class});
Object o = m.invoke(null, new Object[]{"android.permissio...
Override browser form-filling and input highlighting with HTML/CSS
...f that won't work, you can try to set the style via javascript programmatically
$("input[type='text']").bind('focus', function() {
$(this).css('background-color', 'white');
});
3) if that won't work, you're doomed :-) consider this:
this wont hide the yellow color, but will make the text read...