大约有 23,000 项符合查询结果（耗时：0.0320秒） [XML]
Can I add a UNIQUE constraint to a PostgreSQL table, after it's already created?
...
If you had a table that already had a existing constraints based on lets say: name and lastname and you wanted to add one more unique constraint, you had to drop the entire constrain by:
ALTER TABLE your_table DROP CONSTRAINT constraint_name;
Make sure tha the new constraint you w...
How to percent-encode URL parameters in Python?
...s similar to Paolo's answer.
I think module requests is much better. It's based on urllib3.
You can try this:
>>> from requests.utils import quote
>>> quote('/test')
'/test'
>>> quote('/test', safe='')
'%2Ftest'
...
Difference between Xcode version (CFBundleShortVersionString) and build (CFBundleVersion)
...se however you like in development, or to show within your app. Use octal (base-8) and iterate in reverse by 12, if you like.
– nekno
Aug 11 '11 at 18:48
16
...
What is the purpose of a self executing function in javascript?
...vascript library to my page that translates advanced characters into their base level representations?
Wait... what?
I mean, if someone types in a character with some kind of accent on it, but I only want 'English' characters A-Z in my program? Well... the Spanish 'ñ' and French 'é' characters ...
What is digest authentication?
...ere should not be any, method to obtain the original password from the database making digest authorization impossible.
– Ramon de Klein
Apr 20 '16 at 15:25
3
...
What does the smiley face “:)” mean in CSS?
...ld do your best to give the best experience in all browsers that your user base is using. Not to mention, in my opinion, you shouldn't support browsers that the company that made them don't support anymore.
– AlienDev
Aug 26 '14 at 13:39
...
Should I put input elements inside a label element?
...t is wise anymore:
Checkboxes and radios use are built to support HTML-based form validation and provide concise, accessible labels. As such, our <input>s and <label>s are sibling elements as opposed to an <input> within a <label>. This is slightly more verbose as you mus...
F# changes to OCaml [closed]
...F#, so it's much more than just "OCaml without functors". F# is definitely based on OCaml (and takes ideas from other languages such as Haskell) and shares many aspects with them, however there is also a lot of other things. I guess that without things like asynchronous workflows, .NET style OO and ...
Get started with Latex on Linux [closed]
...h, tur
kish, ukrainian, nohyphenation, loaded.
(/usr/share/texmf/tex/latex/base/article.cls
Document Class: article 2004/02/16 v1.4f Standard LaTeX document class
(/usr/share/texmf/tex/latex/base/size12.clo))
No file test.aux.
[1] (./test.aux) )
Output written on test.dvi (1 page, 1508 bytes).
Trans...
Should I declare Jackson's ObjectMapper as a static field?
...erformance was not good.
When I replaced static variable with the instance based variable, stalling disappeared and performance quadrupled. I.e. 2.4 millions JSON documents were processed in 40min.56sec., instead of 2.5 hours previously.
...