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Differences in boolean operators: & vs && and | vs ||
I know the rules for && and || but what are & and | ? Please explain these to me with an example.
11 Ans...
Python, compute list difference
...vation is important Roman Bodnarchuk may have a better approach. For speed and pure set-like behavior this one seems better.
– Bryan P
Feb 13 '15 at 23:01
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SQL Server - transactions roll back on error?
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Will this work on MS SQL 2K and higher? This seems the most simple solution.
– jonathanpeppers
Nov 17 '09 at 15:49
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Find object by id in an array of JavaScript objects
... '45').map(x => x.foo);
Side note: methods like find() or filter(), and arrow functions are not supported by older browsers (like IE), so if you want to support these browsers, you should transpile your code using Babel (with the polyfill).
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Omitting the second expression when using the if-else shorthand
Can I write the if else shorthand without the else ?
8 Answers
8
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Concept of void pointer in C programming
... is there is any way of generalizing a function which can receive pointer and store it in void pointer and by using that void pointer we can make a generalized function..
You cannot just dereference it in a portable way, as it may not be properly aligned. It may be an issue on some architectures ...
Installing PG gem on OS X - failure to build native extension
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Same error for me and I didn't experience it until I downloaded OS X 10.9 (Mavericks). Sigh, another OS upgrade headache.
Here's how I fixed it (with homebrew):
Install another build of Xcode Tools (typing brew update in the terminal will p...
Why does Windows64 use a different calling convention from all other OSes on x86-64?
...?BX, ?SP, ?BP, ?SI, ?DI.
Hence choosing A/C/D (regs 0..2) for return value and the first two arguments (which is the "classical" 32bit __fastcall convention) is a logical choice. As far as going to 64bit is concerned, the "higher" regs are ordered, and both Microsoft and UN*X/Linux went for R8 / R9 ...
Load multiple packages at once
...w can I load a bunch of packages at once with out retyping the require command over and over? I've tried three approaches all of which crash and burn.
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Paste multiple columns together
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no need for apply here; paste is vectorised, and that's more efficient
– baptiste
Jan 28 '13 at 21:49
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