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What does “Document-oriented” vs. Key-Value mean when talking about MongoDB vs Cassandra?
... of a database at the top level, then collections which are like tables in MySQL (for example) and then documents which are contained within the collection, like rows in MySQL. Each document has a field and a value where this is similar to columns and values in MySQL. Fields can be simple key / valu...
Avoid web.config inheritance in child web application using inheritInChildApplications
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It needs to go directly under the root <configuration> node and you need to set a path like this:
<?xml version="1.0"?>
<configuration>
<location path="." inheritInChildApplications="false">
<!-- Stuff that shouldn't b...
Windows equivalent of the 'tail' command
...n*}"
Tail Command:
powershell -command "& {Get-Content *filename* | Select-Object -last *n*}"
or, directly from PowerShell:
Get-Content *filename* -TotalCount *n*
Get-Content *filename* | Select-Object -last *n*
update
PowerShell 3.0 (Windows 8 and higher) added Tail command with alias...
请停下来重新想下 你究竟为何创业？ - 资讯 - 清泛网 - 专注C/C++及内核技术
...扯？这里不应该是创业成功者的鸡汤分享区么？比如你是如何拿到几亿美元的风投，或者起码要秀一下融资的雄心壮志吧？毕竟哪个心智正常的人会花费十几年的时间经营公司，却连想要吞并别人的野心都没有。
唔，我之所以...
How to change indentation mode in Atom?
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OS X:
Go to Atom -> prefrences or CMD + ,
Scroll down and select "Tab Length" that you prefer.
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Django CharField vs TextField
...nce among these three types", but AFAIK there are some differences in e.g. MySQL, so this is something to keep in mind.
A good rule of thumb is that you use CharField when you need to limit the maximum length, TextField otherwise.
This is not really Django-specific, also.
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Importing CommonCrypto in a Swift framework
...code.app path which can vary system-to-system, especially if you use xcode-select to switch to a beta version, or are building on a CI server where multiple versions are installed in non-standard locations. You also don't need to hard code the SDK so this should work for iOS, macOS, etc. You also do...
物联网入门 · App Inventor 2 中文网
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应用介绍
这组教程演示 App Inventor 如何通过 BluetoothLE 与 Arduino 101 通信。完成后，你可以读取加速度、湿度、光线、土壤湿度、距离和温度，也可以控制 RGB LCD、录音器和 LED。
每个实验都拆成介绍、接线...
How can I recover a removed file in Mercurial (if at all)?
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from eclipse this can be done by right clicking the file Select Team-->Revert
– Emil
Oct 10 '13 at 6:43
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How to make rounded percentages add up to 100%
...original,
decimal forceSum, int decimals)
{
var rounded = original.Select(x => Math.Round(x, decimals)).ToList();
Debug.Assert(Math.Round(forceSum, decimals) == forceSum);
var delta = forceSum - rounded.Sum();
if (delta == 0) return rounded;
var deltaUnit = Convert.ToDecim...