大约有 15,000 项符合查询结果（耗时：0.0330秒） [XML]
Return None if Dictionary key is not available
...r']['test']['sss'] to return None instead of exception, After one depth it start giving TypeError instead of KeyError
– nehem
Nov 10 '15 at 1:40
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Underscore vs Double underscore with variables and methods [duplicate]
...icator. E.g.
from M import *
does not import objects whose name starts with an underscore.
single_trailing_underscore_: used by convention to avoid conflicts with Python keyword, e.g.
Tkinter.Toplevel(master, class_='ClassName')
__double_leading_underscore: when naming a class at...
Extract only right most n letters from a string
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Start index cannot be less than 0 either.
– James
Nov 12 '09 at 14:06
2
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Block comments in html.erb templates in rails
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it works if = is at start of new line just like in the answer
– dhaval
Jun 20 '14 at 6:39
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Cannot add or update a child row: a foreign key constraint fails
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@SachinfromPune just add SET FOREIGN_KEY_CHECKS=0; at starting of mysql file and SET FOREIGN_KEY_CHECKS=1; at end of mysql file, reimport data
– inrsaurabh
Sep 15 '17 at 12:26
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What is the difference between “Flush Magento Cache” and “Flush Cache Storage” in magento's cache ma
... loads the page again another request is made to Magento which immediately starts making new mage--* directories. Manually deleting the same must be the ultimate since it doesn't cause new cache entries. MageTool has a clear cache command for this purpose.
– clockworkgeek
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How to insert a line break before an element using CSS
...e in the psuedo-element generated content. Read more in the CSS2 spec.
#restart:before { content: '\A'; }
You may also need to add white-space:pre; to #restart.
note: \A denotes the end of a line.
p.s. Another treatment to be
:before { content: ' '; display: block; }
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How to find reason of failed Build without any error or warning
...ion contains more than one project, try building them one at a time.
Try restart Visual Studio.
Try restart Computer.
Try "Rebuild all"
Try "Clean Solution" then remove your "vspscc" files and "vssscc" files and then restart Visual Studio and then "Rebuild All".
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When monkey patching an instance method, can you call the overridden method from the new implementat
... Was looking for an explanation on patching like this ever since I started on ruby and rails. Great answer! The only thing missing for me was a note on class_eval vs. reopening a class. Here it is: stackoverflow.com/a/10304721/188462
– Eugene
Jul 11 '12...
How would you do a “not in” query with LINQ?
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For people who start with a group of in-memory objects and are querying against a database, I've found this to be the best way to go:
var itemIds = inMemoryList.Select(x => x.Id).ToArray();
var otherObjects = context.ItemList.Where(x =&...