大约有 47,000 项符合查询结果（耗时：0.0522秒） [XML]
C++ catching all exceptions
...
340
try{
// ...
} catch (...) {
// ...
}
will catch all C++ exceptions, but it should be c...
Rails: select unique values from a column
...rails 5+
Model.distinct.pluck(:rating)
Update
Apparently, as of rails 5.0.0.1, it works only on "top level" queries, like above. Doesn't work on collection proxies ("has_many" relations, for example).
Address.distinct.pluck(:city) # => ['Moscow']
user.addresses.distinct.pluck(:city) # => [...
What is the command to truncate a SQL Server log file?
...
130
if I remember well... in query analyzer or equivalent:
BACKUP LOG databasename WITH TRUNCATE_...
Gson: How to exclude specific fields from Serialization without annotations
...
dimo414
40.6k1616 gold badges121121 silver badges205205 bronze badges
answered May 4 '11 at 20:40
Chris Seline...
Error: Could not find or load main class [duplicate]
...
Sae1962
1,0201212 silver badges2727 bronze badges
answered Sep 20 '11 at 13:16
SaketSaket
...
How to sort a list of strings?
...
skolima
28.6k2525 gold badges106106 silver badges145145 bronze badges
answered Aug 30 '08 at 17:10
Eli CourtwrightEli Courtwright
...
removeEventListener on anonymous functions in JavaScript
...
Adam HeathAdam Heath
4,20111 gold badge3232 silver badges4949 bronze badges
...
How to detect input type=file “change” for the same file?
...
answered Nov 7 '10 at 15:14
BrunoLMBrunoLM
84.4k7373 gold badges266266 silver badges420420 bronze badges
...
Using link_to with embedded HTML
...
260
Two ways. Either:
<%= link_to user_path(@user) do %>
<i class="icon-ok icon-white"&g...
Python multiprocessing PicklingError: Can't pickle
...strap_inner
self.run()
File "/usr/lib/python2.7/threading.py", line 505, in run
self.__target(*self.__args, **self.__kwargs)
File "/usr/lib/python2.7/multiprocessing/pool.py", line 315, in _handle_tasks
put(task)
PicklingError: Can't pickle <type 'function'>: attribute lookup _...