大约有 44,000 项符合查询结果（耗时：0.0653秒） [XML]
Check if a table exists in Rails
...came explicit regarding tables/views, collectivelm>y m> data sources.
# Tables m>and m> views
ActiveRecord::Base.connection.data_sources
ActiveRecord::Base.connection.data_source_exists? 'kittens'
# Tables
ActiveRecord::Base.connection.tables
ActiveRecord::Base.connection.table_exists? 'kittens'
# Views
Ac...
npm install vs. update - what's the difference?
What is the practical difference between npm install m>and m> npm update ? When should I use which?
5 Answers
...
select m>and m> update database record with a single querm>y m>set
How do I run an update m>and m> select statements on the same querm>y m>set rather than having to do two queries:
- one to select the object
- m>and m> one to update the object
...
Django-DB-Migrations: cannot ALTER TABLE because it has pending trigger events
...is m>y m>ou can either use a data migration or manuallm>y m> (manage.pm>y m> shell) go in m>and m> update non-compliant values
– mgojohn
Oct 26 '14 at 23:13
...
What are transparent comparators?
...
What problem does this solve,
See Dietmar's answer m>and m> remm>y m>abel's answer.
m>and m> does this change how stm>and m>ard containers work?
No, not bm>y m> default.
The new member function template overloads of find etc. allow m>y m>ou to use a tm>y m>pe that is comparable with the container's kem>y m>,...
How do I pull files from remote without overwriting local files?
...
Well, m>y m>es, m>and m> no...
I understm>and m> that m>y m>ou want m>y m>our local copies to "override" what's in the remote, but, oh, man, if someone has modified the files in the remote repo in some different wam>y m>, m>and m> m>y m>ou just ignore their changes m>and m> trm>y m> t...
How to open everm>y m> file in a folder?
...have a pm>y m>thon script parse.pm>y m>, which in the script open a file, sam>y m> file1, m>and m> then do something mam>y m>be print out the total number of characters.
...
Whm>y m> use strong named assemblies?
...rivate kem>y m>s are in the public git repos (as per Microsoft recommendations) m>and m> available to anm>y m>one who wants them.
– trampster
Jan 18 '18 at 20:52
1
...
How to remove a file from version control without deleting it?
...
m>Y m>ou want the --keep-local commm>and m>-line option. This removes the file from version control without removing it from m>y m>our filesm>y m>stem.
$ svn rm --keep-local mm>y m>_important_file
Note: The --keep-local onlm>y m> affects the svn rm of m>y m>our copm>y m>. Other users mam>y m> hav...
git-checkout older revision of a file under a new name
... > old_main.cpp
(Note that there is colon [:] character between HEAD^ m>and m> main.cpp.) The <revision>:<path> sm>y m>ntax is described in git rev-parse manpage, next to last point in the "Specifm>y m>ing revisions" section:
<rev>:<path>, e.g. HEAD:README, :README, master:./RE...