大约有 40,000 项符合查询结果（耗时：0.0471秒） [XML]
Apply function to all elements of collection through LINQ [duplicate]
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@BKSpurgeon: Select is a projection: 1) it's lazily evaluated; just calling it won't do anything. 2) Select produces a result - ForEach doesn't.
– Jon Skeet
Mar 20 '17 at 9:24
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find vs find_by vs where
...irb(main):037:0> @kit = Kit.find_by(number: "3456")
Kit Load (0.9ms) SELECT "kits".* FROM "kits" WHERE "kits"."number" =
'3456' LIMIT 1
=> #<Kit id: 1, number: "3456", created_at: "2015-05-12 06:10:56",
updated_at: "2015-05-12 06:10:56", job_id: nil>
irb(main):038:0> @kit.upd...
LINQ order by null column where order is ascending and nulls should be last
... descending
orderby p.LowestPrice descending
select p;
will be translated by the compiler to
var products = _context.Products
.Where(p => p.ProductTypeId == 1)
.OrderByDescending(p => p.LowestPrice.HasValue)
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XPath - Selecting elements that equal a value
In Xpath, I am wanting to select elements that equal a specific value.
2 Answers
2
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How to select the first element with a specific attribute using XPath
The XPath bookstore/book[1] selects the first book node under bookstore .
9 Answers
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How do I tell git to always select my local version for conflicted merges on a specific file?
...e general question, i.e. your question(!):
How do I tell git to always select my local version for conflicted merges on a specific file ? (for any file or group of file)
This kind of merge is a "copy merge", in which you will always copy 'ours' or 'theirs' version of a file whenever there is a...
Xcode stops working after set “xcode-select -switch”
...eloper directory, not the Xcode application bundle. Run this:
sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer
With recent versions of Xcode, you can go to Xcode ➙ Preferences… ➙ Locations and pick one of the options for Command Line Tools to set the location.
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How do I export a project in the Android studio?
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Now "android:debuggalbe=false" is not needed and you can select build type when exporting a signed APK.
– echo
Sep 4 '14 at 10:28
4
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Oracle 11.2.0.4 RAC FOR redhat 6.4 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...nolog
SQL> conn / as sysdba
SQL> startup
查看数据库状态
SQL> select open_mode from v$database;
OPEN_MODE
--------------------
READ WRITE
查看数据库字符集
SQL> select userenv('language') from dual;
SQL> select * from props$ where name='NLS_CHARACTERSET';
SQL> select * ...
How can I tell IntelliJ's “Find in Files” to ignore generated files?
...for the Find
in Path dialog. (Mac users press command+shift+F)
Under Scope select Custom.
Choose a scope from the drop down list or create a Custom Scope by clicking on the ... button to the right of dropdown.
In the dialog that appears, click on the + button and select Local
On the right pane you...