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Why is string concatenation faster than array join?
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149
Browser string optimizations have changed the string concatenation picture.
Firefox was...
How to add border radius on table row
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answered Nov 4 '10 at 5:40
theazureshadowtheazureshadow
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YYYY-MM-DD format date in shell script
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In bash (>=4.2) it is preferable to use printf's built-in date formatter (part of bash) rather than the external date (usually GNU date).
As such:
# put current date as yyyy-mm-dd in $date
# -1 -> explicit current date, bash >=4...
How do I use floating-point division in bash?
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248
You can't. bash only does integers; you must delegate to a tool such as bc.
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How to handle invalid SSL certificates with Apache HttpClient? [duplicate]
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edited May 1 '12 at 23:43
Gray
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answered ...
Your content must have a ListView whose id attribute is 'android.R.id.list'
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345
Rename the id of your ListView like this,
<ListView android:id="@android:id/list"
andr...
Get generic type of class at runtime
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answered Aug 4 '10 at 8:55
HenningHenning
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How do I compare two strings in Perl?
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answered Jul 24 '09 at 1:34
Sinan ÜnürSinan Ünür
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【BLE技术内幕】BLE技术揭秘 - 创客硬件开发 - 清泛IT论坛，有思想、有深度
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BLE是低功耗蓝牙的英文缩写（Bluetooth Low Energy），是蓝牙4.0版本起开始支持的新的、低功耗版本的蓝牙技术规范。蓝牙技术联盟（Bluetooth SIG）在2010年发布了跨时代的蓝牙4.0，它并不是蓝牙3.0的简单升级版本，而是全新的技术架...
Why do x86-64 systems have only a 48 bit virtual address space?
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Because that's all that's needed. 48 bits give you an address space of 256 terabyte. That's a lot. You're not going to see a system which needs more than that any time soon.
So CPU manufacturers took a shortcut. They use an instruction set which allows a ful...