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delete map[key] in go?
...hat syntax has gone; instead there is a new built-in function, delete. The call
delete(m, k)
will delete the map entry retrieved by the expression m[k]. There is no return value. Deleting a non-existent entry is a no-op.
Updating: Running go fix will convert expressions of the form m[k] = value,...
How do CDI and EJB compare? interact?
...pplications. In addition to this, CDI also exposes a very advanced feature called portable extensions, which is a kind of plug-in mechanism for vendors to provide extra functionality to Java EE that can be made available on all implementations (Glassfish, JBoss AS, Websphere, etc).
EJB3 beans were ...
In HTML I can make a checkmark with ✓ . Is there a corresponding X-mark?
...
The complete reference is called Unicode! You could look amongst the “Symbols/Other” character, perhaps (though you font probably won't have glyphs for much of it): fileformat.info/info/unicode/category/So/list.htm
– bobince
...
Postgresql SELECT if string contains
...
You should use 'tag_name' outside of quotes; then its interpreted as a field of the record. Concatenate using '||' with the literal percent signs:
SELECT id FROM TAG_TABLE WHERE 'aaaaaaaa' LIKE '%' || tag_name || '%';
...
What does && mean in void *p = &&abc;
... OS loads the .exe file from the disk, a component of the operating system called "the loader" (windows has the "PE Loader", linux has "ELF loader" or maybe even others, if they're compiled in the kernel), it does a "virtualization" of that program, turning it into a process.
This process thinks it ...
Why Collections.sort uses merge sort instead of quicksort?
... to provide a stable sort (Merge Sort)
to sort object references. (Techincally speaking, multiple sequential
stable sorts result in a lexicographic ordering on the keys in the
reverse order of the sorts: the final sort determines the most
significant subkey.)
It's a nice side benefit th...
INSERT INTO … SELECT FROM … ON DUPLICATE KEY UPDATE
...e, and the second part references the SELECT columns.
INSERT INTO lee(exp_id, created_by, location, animal, starttime, endtime, entct,
inact, inadur, inadist,
smlct, smldur, smldist,
larct, lardur, lardist,
emptyct, emptydur)
SELEC...
Difference between Document-based and Key/Value-based databases?
...me debate on the correct name for databases such as Cassandra, I'd like to call them column-family stores. Although key-value pairs are an essential part of Cassandra, it's not limited to just that. It allows you to nest key-value pairs, so a key could refer to multiple sub-key-value pairs.
You can...
How to convert a boolean array to an int array
... what i've read, if you need to do some time critical crunching you should call c from python. Do you know any references for doing this? also, thank you for your help. surprised how fast everyone responded!
– Kwolf
Jul 6 '13 at 20:54
...
MongoDB Many-to-Many Association
...ntain the roles in separate documents then you can include the document's _id in the roles array instead of the name:
{name:"Joe"
,roles:["4b5783300334000000000aa9","5783300334000000000aa943","6c6793300334001000000006"]
}
and set up the roles like:
{_id:"6c6793300334001000000006"
,rolename:"Engi...