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Why is C so fast, and why aren't other languages as fast or faster? [closed]
...down to native machine code. Since those other languages tend to exist in order to obtain a higher level of abstraction than C, those extra statements required in C tend to be focused on adding safety, adding complexity, and providing error handling. Those are often good things, but they have a co...
HTML5 Pre-resize images before uploading
...canvas.toDataURL("image/jpeg", 0.5) to make sure the quality is brought in order to decrease the file size. I came across this comment on the mozilla blog post and saw the bug resolution here bugzilla.mozilla.org/show_bug.cgi?id=564388
– sbose
Jan 15 '13 at 10:...
Why is the gets function so dangerous that it should not be used?
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In order to use gets safely, you have to know exactly how many characters you will be reading, so that you can make your buffer large enough. You will only know that if you know exactly what data you will be reading.
Instead of...
Setting custom UITableViewCells height
...ew in my cell, and I want to get its height in heightForRowAtIndexPath: in order to set the row's height, but I don't know how to get it ! Thanks
– rdurand
Jul 24 '12 at 13:47
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Best practices for reducing Garbage Collector activity in Javascript
...iod, which is equivalent to allocation rate. Focus on these in descending order of rate.
The techniques are not rocket science. Avoid boxed objects when you can do with an unboxed one. Use global variables to hold and reuse single boxed objects rather than allocating fresh ones in each iteratio...
What is pseudopolynomial time? How does it differ from polynomial time?
...n the array, while in TSP n refers to the number of nodes in the graph. In order to standardize the definition of what "n" actually means in this context, the formal definition of time complexity defines the "size" of a problem as follows:
The size of the input to a problem is the number of bits...
Post parameter is always null
...o use an actual parameter type of a certain object? e.g, parameter of type Order for a web api method?
– Ron Nuni
Dec 7 '16 at 9:02
9
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How to get a number of random elements from an array?
...original population unchanged. The resulting list is
in selection order so that all sub-slices will also be valid random
samples. This allows raffle winners (the sample) to be partitioned
into grand prize and second place winners (the subslices).
Members of the pop...
What is “2's Complement”?
...nd that to mean -15?
The answer is that we change the meaning of the high-order bit (the leftmost one). This bit will be a 1 for all negative numbers. The change will be to change the sign of its contribution to the value of the number it appears in. So now our 11110001 is understood to represent...
Change name of iPhone app in Xcode 4
...t app. You will need to generate a new App ID and Provisioning Profile in order to distribute your app to a physical device.
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