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Filter rows which contain a certain string
...n easily extend to more than one column.
Below also a solution with filter_all in order to find the string in any column,
using diamonds as example, looking for the string "V"
library(tidyverse)
String in only one column
# for only one column... extendable to more than one creating a column list in...
How to specify a multi-line shell variable?
...
dogbanedogbane
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Vagrant stuck connection timeout retrying
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I really didn't understand what this does, but it worked. So thank you.
– Lavixu
Aug 16 '14 at 4:05
1
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Auto reloading python Flask app upon code changes
...nt recommended way is with the flask command line utility.
https://flask.palletsprojects.com/en/1.1.x/quickstart/#debug-mode
Example:
$ export FLASK_APP=main.py
$ export FLASK_ENV=development
$ flask run
or in one command:
$ FLASK_APP=main.py FLASK_ENV=development flask run
If you want diff...
__declspec(dllexport) 导出符号解决链接失败问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
...不可放在class的前面。
再来个跨平台版本：
#ifdef WIN32
#ifdef XXX_EXPORTS
#define XXX_API __declspace(dllexport)
#elif defined USE_LIB
#define XXX_API
#else
#define XXX_API __declspace(dllimport)
#endif
#define XXX_LOCAL
#else
#ifdef XXX_EXPORTS
...
Java: PrintStream to String?
...that object. How can I capture this function's output in a String? Specifically, I want to use it as in a toString method.
...
C# switch statement limitations - why?
...a big if-else statement.
Each case must be unique and evaluated
statically. The switch statement does
a constant time branch regardless of
how many cases you have. The if-else
statement evaluates each condition
until it finds one that is true.
In fact, the C# switch statement is n...
How do I use $scope.$watch and $scope.$apply in AngularJS?
...cycle and $scope
First and foremost, AngularJS defines a concept of a so-called digest cycle. This cycle can be considered as a loop, during which AngularJS checks if there are any changes to all the variables watched by all the $scopes. So if you have $scope.myVar defined in your controller and th...
How to encode a URL in Swift [duplicate]
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Swift 4.2
var urlString = originalString.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)
Swift 3.0
var address = "American Tourister, Abids Road, Bogulkunta, Hyderabad, Andhra Pradesh, India"
let escapedAddress = address.addingPercentEncoding(withAllowedCharacters: Characte...
How do I check if a string contains another string in Swift?
...dex>?
– newacct
Jul 11 '15 at 20:32
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