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This worked thanks so much for your help! I was ready to pull my hair out over this last night.
– Tony Barsotti
Apr 11 '14 at 12:14
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Hidden Features of C++? [closed]
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Very interesting. I can see that making some unreadable code though.
– Jason Baker
Nov 20 '08 at 2:59
112
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Backup/Restore a dockerized PostgreSQL database
... postgres container. Thus, when the postgres server starts, the data are already there.
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Declaration suffix for decimal type
...y had do use something other than d, since that's used by Double!
Further reading: decimal (C# Reference)
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If strings are immutable in .NET, then why does Substring take O(n) time?
... I've seen this sort of code quite a bit: string contents = File.ReadAllText(filename); foreach (string line in content.Split("\n")) ... or other versions of it. I mean read an entire file, then process the various parts. That sort of code would be considerably faster and require less memo...
Why is iterating through a large Django QuerySet consuming massive amounts of memory?
...you have everything in memory, and the results come spilling out.
From my reading of the docs, iterator() does nothing more than bypass QuerySet's internal caching mechanisms. I think it might make sense for it to a do a one-by-one thing, but that would conversely require ten-million individual hi...
When to use in vs ref vs out
...ue when the method doesn't make use of it.
Beyond that, it also shows the reader of the declaration or the call whether the initial value is relevant (and potentially preserved), or thrown away.
As a minor difference, an out parameter needs not be initialized.
Example for out:
string a, b;
perso...
git: undo all working dir changes including new files
...careful with these !!
## you may end up deleting what you don't want to
## read comments and manual.
git clean -f -d # remove untracked
git clean -f -x -d # CAUTION: as above but removes ignored files like config.
git clean -fxd :/ # CAUTION: as above, but cleans untracked and ignored files through ...
Meaning of 'const' last in a function declaration of a class?
... @JaredPar does this mean that any member function representing a read-only operation should be marked as const?
– kovac
Mar 17 '19 at 9:03
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define() vs. const
... that anyway? One common application is to check whether the constant is already defined:
if (!defined('FOO')) {
define('FOO', 'BAR');
}
const accepts a static scalar (number, string or other constant like true, false, null, __FILE__), whereas define() takes any expression. Since PHP 5.6 const...