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When NOT to use Cassandra?
...Why use NoSQL
In the case of RDBMS, making a choice is quite easy because all the databases like MySQL, Oracle, MS SQL, PostgreSQL in this category offer almost the same kind of solutions oriented toward ACID properties. When it comes to NoSQL, the decision becomes difficult because every NoSQL dat...
ActiveRecord: size vs count
...l valid.
You'll adapt the function you use depending on your needs.
Basically:
if you already load all entries, say User.all, then you should use length to avoid another db query
if you haven't anything loaded, use count to make a count query on your db
if you don't want to bother with these con...
Create a branch in Git from another branch
... newbies, this is what a --no-ff merge looks like
– A__
Oct 6 '18 at 23:01
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show 10 more comments
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How do you get the index of the current iteration of a foreach loop?
...or iterating over collections that implement IEnumerable. It does this by calling GetEnumerator on the collection, which will return an Enumerator.
This Enumerator has a method and a property:
MoveNext()
Current
Current returns the object that Enumerator is currently on, MoveNext updates Current t...
Why does the PHP json_encode function convert UTF-8 strings to hexadecimal entities?
...
Since PHP/5.4.0, there is an option called JSON_UNESCAPED_UNICODE. Check it out:
https://php.net/function.json-encode
Therefore you should try:
json_encode( $text, JSON_UNESCAPED_UNICODE );
...
void in C# generics?
...nctions need to return null, but if it unifies your code, it should be a small price to pay.
This inability to use void as a return type is at least partially responsible for a split between the Func<...> and Action<...> families of generic delegates: had it been possible to return void...
How do you comment out code in PowerShell?
... PowerShell V2 <# #> can be used for block comments and more specifically for help comments.
#REQUIRES -Version 2.0
<#
.SYNOPSIS
A brief description of the function or script. This keyword can be used
only once in each topic.
.DESCRIPTION
A detailed description of the function...
How can I display an image from a file in Jupyter Notebook?
...y? (Don't tell me that otherwise it doesn't work. Please explain why this call to 'display' is needed in a loop but not if you just dispaly one image).
– Kris
May 1 '17 at 1:25
12
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brew install mysql on macOS
I'm trying to setup up MySQL on mac os 10.6 using Homebrew by brew install mysql 5.1.52 .
16 Answers
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CDHtmlDialog的基本使用（JS调用C++函数的实现） - C/C++ - 清泛网 - 专注IT技能提升
CDHtmlDialog的基本使用（JS调用C++函数的实现）CDHtmlDialog_js_call_cpp_interactiveCDHtmlDialog JS C++一、建立一个新的MFC Application工程，在下面这一步把HTML Dialog给勾上：二、修改工程中的JSCppInteractive.htm，代码如下：<HTML><HEA...一、建立一个...