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Implementing Comments and Likes in database
I'm a software developer. I love to code, but I hate databases... Currently, I'm creating a website on which a user will be allowed to mark an entity as liked (like in FB), tag it and comment .
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Local file access with JavaScript
... repeating:
Implementations of the APIs currently exist only in Chromium-based browsers (Chrome & Opera)
Both of the APIs were taken off of the W3C standards track on April 24, 2014, and as of now are proprietary
Removal of the (now proprietary) APIs from implementing browsers in the future i...
Cast Object to Generic Type for returning
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Much better. I hate exception-based program flows. In my case, I wanted to check whether the object in question implements an interface. For that, I used isAssignableFrom.
– haslo
Aug 2 '19 at 9:50
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Split a vector into chunks in R
...ve to split a vector into n chunks of equal size in R. I couldn't find any base function to do that. Also Google didn't get me anywhere. So here is what I came up with, hopefully it helps someone some where.
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Search All Fields In All Tables For A Specific Value (Oracle)
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I've tried using this statement below
to find an appropriate column based on
what I think it should be named but it
returned no results.*
SELECT * from dba_objects WHERE
object_name like '%DTN%'
A column isn't an object. If you mean that you expect the column name to be like '%DTN%',...
推荐系统算法初探 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...很多电商网站上都有用到。CF算法包括基于用户的CF(User-based CF)和基于物品的CF(Item-based CF)。
基于用户的CF原理如下：
分析各个用户对item的评价（通过浏览记录、购买记录等）；
依据用户对item的评价计算得出所有用户之间的...
How do I get the filepath for a class in Python?
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This did not for a class that extends an abstract base class (metaclass=abc.ABCMeta), as it returns /usr/local/lib/python3.7/abc.py instead of the appropriate file. The solution by @JarretHardie (below) worked better.
– martian111
Sep ...
How to use ELMAH to manually log errors
...ltering rules to the exception. Log method does not.
Raise is subscription based and is able to log one exception into the several loggers.
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Disable Required validation attribute under certain circumstances
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{
[Required]
public override string ID
{
get { return base.ID; }
set { base.ID = value; }
}
}
This way, you don't have to bother with client/server side validations, the framework will behave the way it's supposed to. Also, if you define a [Display] attribute on th...
Creating a new user and password with Ansible
...andom password for user only on creation
shell: /usr/bin/openssl rand -base64 32 | passwd --stdin deployer
when: newuser.changed
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