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What is the “__v” field in Mongoose
I'm using Mongoose version 3 with MongoDB version 2.2. I've noticed a __v field has started appearing in my MongoDB documents. Is it something to do with versioning? How is it used?
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Make Visual Studio understand CamelCase when hitting Ctrl and cursor keys
Is there a way that I can configure Visual Studio 2008 to understand CamelCase? Specifically, I'd like to be able to get Ctrl + right or left cursor to take me to a subsection of a variable or type name.
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Importing files from different folder
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edited Sep 21 at 14:33
answered Dec 8 '10 at 2:12
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Computed / calculated / virtual / derived columns in PostgreSQL
...- as defined in the SQL standard and implemented by some RDBMS including DB2, MySQL and Oracle. Nor the similar "computed columns" of SQL Server.
STORED generated columns are introduced with Postgres 12. Trivial example:
CREATE TABLE tbl (
int1 int
, int2 int
, product bigint GENERATED ALW...
How to update column with null value
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No special syntax:
CREATE TABLE your_table (some_id int, your_column varchar(100));
INSERT I...
What does ||= (or-equals) mean in Ruby?
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horizontal scrollbar on top and bottom of table
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To simulate a second horizontal scrollbar on top of an element, put a "dummy" div above the el...
Issue with virtualenv - cannot activate
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开源跳板机(堡垒机)Jumpserver v2.0.0 使用说明 - 开源 & Github - 清泛网 ...
开源跳板机(堡垒机)Jumpserver v2.0.0 使用说明Jumpserver 是一款由python编写开源的跳板机(堡垒机)系统，实现了跳板机应有的功能。基于ssh协议来管理，客户端无需安装agent。 支持常见系统:
CentOS, RedHat, Fedora, Amazon Linux
Debian
SUSE, Ubunt...