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“INSERT IGNORE” vs “INSERT … ON DUPLICATE KEY UPDATE”
...th many rows, I want to skip duplicate entries that would otherwise cause failure. After some research, my options appear to be the use of either:
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Why is it recommended to have empty line in the end of a source file?
...ikely to result in a newline at the end.
– Raimund Krämer
Sep 24 at 8:25
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Should I put #! (shebang) in Python scripts, and what form should it take?
...n you can just call ./[your-script.py] in shell.
– skålfyfan
Oct 6 '14 at 22:01
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As the answer ...
How to calculate the SVG Path for an arc (of a circle)
...nt svg element. For example viewBox="0 0 500 500"
– Håken Lid
May 24 '19 at 14:20
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How do I 'git diff' on a certain directory?
...--dir-diff --tool=bc3 --no-prompt" instead
– Mark Schäfer
Nov 1 '18 at 8:22
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Edit line thickness of CSS 'underline' attribute
...s the gap between text and line less huge.
– Victor Häggqvist
Jul 14 '15 at 1:36
I get half pixel vertical lines in a...
BLE（四）嗅探工具 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...方的PacketSniffer程序，可以实现BLE流量嗅探
缺点：
程序界面比较简陋，无法很好的展示出数据包中的层级关系本身是作为开发环节中的调试过程，作为逆向分析工具不够亲切。必须要事先在3个广播信道中指定一个进行监听，若...
App Inventor 2 里那十几个传感器，被问最多的9个问题一次说清 - App应用开...
...闭屏幕背光；另一个是做防误触——手机放口袋里时暂停界面操作。注意它返回的值很粗略，有些设备只有"近/远"两档，别拿它当精确测距仪。Q9: 计时器 Clock 和上面这些传感器是一回事吗？A: 不是。Clock 不是一个传感器...
Need for predictable random generator
...ndomness in small runs of some games is undesirable -- it does seem too unfair for some use cases.
I wrote a simple Shuffle Bag like implementation in Ruby and did some testing. The implementation did this:
If it still seems fair or we haven't reached a threshold of minimum rolls, it returns a...
Validating email addresses using jQuery and regex
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It will not validate äüõ etc letters!!
– D.A.H
Aug 17 '14 at 17:16
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