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Efficient Algorithm for Bit Reversal (from MSB->LSB to LSB->MSB) in C
... trade off memory for speed (assuming your L1 Data Cache is large enough), and reverse 16 bits at a time with a 64K-entry lookup table.
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Simple
unsigned int v; // input bits to be reversed
unsigned int r = v & 1; // r will be reversed bits of v; first get LSB of v
int s = sizeof(v...
How do I correctly clone a JavaScript object?
...ttributes from the object's prototype that should be left in the prototype and not copied to the new instance. If, for instance, you are adding a clone method to Object.prototype, as some answers depict, you will need to explicitly skip that attribute. But what if there are other additional methods ...
Create a nonclustered non-unique index within the CREATE TABLE statement with SQL Server
...nly accept CONSTRAINTs to be added, not indexes. The fact that primary key and unique constraints are implemented in terms of an index is a side effect. To manage indexes, you have CREATE/ALTER/DROP INDEX, as you are well aware.
Why do you have a such a requirement as to add non-unique-non-clustere...
Why can a class not be defined as protected?
...tected or package-private would be the same thing.
You can declare nested and inner classes as protected or private, though.
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Clearing coverage highlighting in Eclipse
...ura or an EMMA plugin), my source code files get highlighted in green, red and yellow depending on which lines of code were covered by tests.
...
Explain Python entry points?
I've read the documentation on egg entry points in Pylons and on the Peak pages, and I still don't really understand. Could someone explain them to me?
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Efficiently convert rows to columns in sql server
...onvert rows to columns in SQL server, I heard that PIVOT is not very fast, and I need to deal with lot of records.
2 Answer...
Android webview slow
My android webviews are slow. This is on everything from phones to 3.0+ tablets with more than adequate specs
10 Answer...
What's the best way to get the last element of an array without deleting it?
... many different options. To be able to choose from them I needed to understand their behavior and performance. In this answer I will share my findings with you, benchmarked against PHP versions 5.6.38, 7.2.10 and 7.3.0RC1 (expected Dec 13 2018).
The options (<<option code>>s) I will tes...
How to resolve “local edit, incoming delete upon update” message
...nflict is about directories instead of files then replace touch with mkdir and rm with rm -r.
Note: the same procedure also work for the following situation:
$ svn st
! C foo
> local delete, incoming delete upon update
! C bar
> local delete, incoming delete upon up...