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When should I use Struct vs. OpenStruct?
...ze
AGE = 21
HASH = {:name => USER, :age => AGE}.freeze
Benchmark.bm 20 do |x|
x.report 'OpenStruct slow' do
REP.times do |index|
OpenStruct.new(:name => "User", :age => 21)
end
end
x.report 'OpenStruct fast' do
REP.times do |index|
OpenStruct.new(HASH)
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Creating JS object with Object.create(null)?
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200
They are not equivalent. {}.constructor.prototype == Object.prototype while Object.create(null...
Java FileOutputStream Create File if not exists
...ity
– Andrii Chernenko
Apr 6 '13 at 20:13
3
createNewFile() is a total waste of time here. The sy...
Different font size of strings in the same TextView
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Utils.setFontSizeForPath(spannable, "big", (int) textView.getTextSize() + 20); // make "big" text bigger 20px than normal text
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Is there a C++ gdb GUI for Linux? [closed]
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edited Apr 20 '16 at 15:20
Aaron McDaid
23.7k88 gold badges5555 silver badges7979 bronze badges
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How to use Session attributes in Spring-mvc
...ttp://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http:...
Pandas - Get first row value of a given column
...to be faster than using .iloc:
In [1]: %timeit -n 1000 df['Btime'].values[20]
5.82 µs ± 142 ns per loop (mean ± std. dev. of 7 runs, 1000 loops each)
In [2]: %timeit -n 1000 df['Btime'].iloc[20]
29.2 µs ± 1.28 µs per loop (mean ± std. dev. of 7 runs, 1000 loops each)
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Compile, Build or Archive problems with Xcode 4 (and dependencies)
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Note to Three20 users migrating old projects from xcode3 to xcode4 : you (may) have to change xcode Preference / locations / advanced / ->Locations specified by target. See stackoverflow.com/questions/5261447/… for more
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Arduino 101 实验02 - 手机开关灯与亮度调节 · App Inventor 2 中文网
...用
不用 Grove 扩展板也可以：把 LED 长脚串一个 220Ω 电阻接到 D5，短脚接 GND，效果一样。
二、接线
LED 模块插在 Grove 扩展板的 D5 接口：
烧固件时注意：在 AIM-for-Things-Arduino101.ino 里，把 LED 设为 ENABLE...
Run a Python script from another Python script, passing in arguments [duplicate]
...-os-system.
– Katriel
Sep 23 '10 at 20:15
9
Yes, that's what the help for os.system says. However...