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What is the best method of handling currency/money?
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Use number_to_currency helper, more info at api.rubyonrails.org/classes/ActionView/Helpers/…
– mlibby
Jun 19 '09 at 21:45
48
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In MySQL, can I copy one row to insert into the same table?
...ORARY TABLE IF EXISTS tmptable_1;
As a temp table, there should never be more than one record, so you don't have to worry about the primary key. Setting it to null allows MySQL to choose the value itself, so there's no risk of creating a duplicate.
If you want to be super-sure you're only getting...
LINQ Aggregate algorithm explained
...que to actually create a large amount of comma separated data, it would be more appropriate to use a StringBuilder, and this is entirely compatible with Aggregate using the seeded overload to initiate the StringBuilder.
var chars = new []{"a","b","c", "d"};
var csv = chars.Aggregate(new StringBuild...
Find MongoDB records where array field is not empty
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185
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What is N-Tier architecture?
...e a few developer job postings recently that include a sentence that reads more or less like this: "Must have experience with N-Tier architecture", or "Must be able to develop N-Tier apps".
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get dictionary key by value
...ot the key. Wouldn't types.FirstOrDefault(x => x.Value == "one").Key be more appropriate?
– floele
Jul 10 '13 at 7:27
20
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How to create a directory in Java?
... As of Java 7, you should probably use the methods in Files as in the more recent answer by Benoit Blanchon. (This answer appears to have been written before Java 7.)
– Brick
Sep 8 '16 at 16:58
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How do you convert a byte array to a hexadecimal string, and vice versa?
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{
return BitConverter.ToString(ba).Replace("-","");
}
There are even more variants of doing it, for example here.
The reverse conversion would go like this:
public static byte[] StringToByteArray(String hex)
{
int NumberChars = hex.Length;
byte[] bytes = new byte[NumberChars / 2];
for ...
Excluding directories in os.walk
...u know that in one case, this optimization has reduced traversal time from more than 100 seconds to about 2 seconds. That's what I call a worthwhile optimization. :D
– antred
Apr 14 '16 at 13:09
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namespaces for enum types - best practices
...sonally, I'd use a namespace so that my ids could be shorter and hopefully more self-explanatory. Then application code could use a 'using namespace' directive and make everything more readable.
From your example above:
using namespace Colors;
void setPenColor( const e c ) {
switch (c) {
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