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Named capturing groups in JavaScript regex?
...
ECMAScript 2018 introduces named capturing groups into JavaScript regexes.
Example:
const auth = 'Bearer AUTHORIZATION_TOKEN'
const { groups: { token } } = /Bearer (?<token>[^ $]*)/.exec(auth)
console.log(token) // "Prints ...
What is the best way to detect a mobile device?
...-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|...
increment date by one month
Let's say I have a date in the following format: 2010-12-11 (year-mon-day)
17 Answers
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Comparing Dates in Oracle SQL
...means:
DD numeric day of the month, 1 - 31
MM numeric month of the year, 01 - 12 ( January is 01 )
YYYY 4 digit year - in my opinion this is always better than a 2 digit year YY as there is no confusion with what century you're referring to.
HH24 hour of the day, 0 - 23
MI minute of the hour, 0 - ...
Printf width specifier to maintain precision of floating-point value
...= 1.0/7.0;
printf("%.*e\n", Digs, OneSeventh);
// 1.428571428571428492127e-01
But let's dig deeper ...
Mathematically, the answer is "0.142857 142857 142857 ...", but we are using finite precision floating point numbers.
Let's assume IEEE 754 double-precision binary.
So the OneSeventh = 1.0/7....
App Inventor 2 字典代码块 · App Inventor 2 中文网
...usetts Institute of Technology"
},
"enrolled": true,
"classes": ["6.001", "18.01", "8.01"]
}
上面的示例显示，在 JSON 中，键（在 : 之前引用的文本）可以映射到不同类型的值。
允许的类型包括数字、文本、其他字典、布尔值和列表。在块语...
What does .SD stand for in data.table in R
...y=y].
– Matt Dowle
Dec 14 '11 at 18:01
6
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How can I find the number of days between two Date objects in Ruby?
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irb(main):005:0> a = Date.parse("12/1/2010")
=> #<Date: 4911063/2,0,2299161>
irb(main):007:0> b = Date.parse("12/21/2010")
=> #<Date: 4911103/2,0,2299161>
irb(main):016:0> c = b.mjd - a.mjd
=> 20
This uses a Modified Julian Day Numbe...
Detecting iOS / Android Operating system
...-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|...
String formatting: % vs. .format vs. string literal
...int
from datetime import datetime,timedelta
once_upon_a_time = datetime(2010, 7, 1, 12, 0, 0)
delta = timedelta(days=13, hours=8, minutes=20)
gen =(once_upon_a_time +x*delta for x in xrange(20))
print '\n'.join(map('{:%Y-%m-%d %H:%M:%S}'.format, gen))
Results in:
['the number is 12', 'the nu...