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How do you query for “is not null” in Mongo?
... Zameer AnsariZameer Ansari
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周鸿祎创业以来的“六大战役” 酷派会是最后一战 - 资讯 - 清泛网 - 专注C/...
...。很多之前傅盛反对上马的项目，譬如浏览器、譬如网址导航，以及一度被他搞砸的杀毒项目，之后都获得了巨大的成功。但是这些项目的负责人，没有一个像傅盛那样自诩为“360浏览器之父”、或“360杀毒之父”。所以，傅盛...
Is it possible to change only the alpha of a rgba background colour on hover?
...ith custom properties:
.brown { --rgb: 118, 76, 41; }
.green { --rgb: 51, 91, 11; }
a { display: block; position: relative; }
div { position: absolute; bottom: 0; background-color: rgba(var(--rgb), 0.8); }
a:hover div { background-color: rgba(var(--rgb), 1); }
To understand how this works, see H...
.NET / C# - Convert char[] to string
...ng.Join only accepts string[] instead of char[]
– sky91
Aug 2 '17 at 8:16
@sky91 not only, you can use String.Join<...
java.sql.SQLException: Incorrect string value: '\xF0\x9F\x91\xBD\xF0\x9F…'
... Nikita Bosik
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answered Dec 7 '12 at 0:15
EsailijaEsailija
128k2222 gold ba...
Error to run Android Studio
... went right the answer should be something like this:
java version "1.8.0_91"
Java(TM) SE Runtime Environment (build 1.8.0_91-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.91-b14, mixed mode)
Check what compiler is used
javac -version
It should show something like this
javac 1.8.0_91
Fin...
Is it possible to have multiple statements in a python lambda expression?
..., 21, 81, 82, 30, 53, 51, 42, 67, 74, 8, 15, 83, 5, 9, 78, 66, 44, 27, 19, 91, 90, 18, 49, 86, 22, 75, 71, 88, 92, 33, 89, 69, 80, 38]
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43...
pandas dataframe columns scaling with sklearn
...Scaler()
>>> dfTest = pd.DataFrame({'A':[14.00,90.20,90.95,96.27,91.21],
'B':[103.02,107.26,110.35,114.23,114.68],
'C':['big','small','big','small','small']})
>>> dfTest[['A', 'B']] = scaler.fit_transform(dfTest[['A', 'B']])
...
How to get certain commit from GitHub project
...to download the latest source code. In this case, I need an older commit: 91f256424531030a454548693c3a6ca49ca3f35a , but I have no idea how to get the entire project from that commit...
...
How to change node.js's console font color?
...t in red color, just do console.log with:
"\033[31m this will be red \033[91m and this will be normal"
Based on that I've created "colog" extension for Node.js. You can install it using:
npm install colog
Repo and npm:
https://github.com/dariuszp/colog
...