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C#: how to get first char of a string?
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Select the oldest tab to see that it as Matthew
– johnc
Oct 7 '10 at 5:10
11
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Checking images for similarity with OpenCV
...ive error between images.
double errorL2 = norm( A, B, CV_L2 );
// Convert to a reasonable scale, since L2 error is summed across all pixels of the image.
double similarity = errorL2 / (double)( A.rows * A.cols );
return similarity;
}
else {
//Images have a different size
ret...
What's the difference between using CGFloat and float?
...memory, which can result in using more memory overall. so its def worth to convert everything up to 64-bits. (unless you want to support 5.1+ or 6.0+ still)
– phil88530
Dec 30 '13 at 14:26
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Hook up Raspberry Pi via Ethernet to laptop without router? [closed]
...how-to-set-up-raspberry-pi-without-a-monitor/54393#54393
UART serial USB converter
This is an alternative to SSH if you just want to get a shell on the Pi: https://en.wikipedia.org/wiki/Serial_port
This does not use SSH or networking itself, but rather the older, simpler, more direct, more relia...
How to iterate over rows in a DataFrame in Pandas
...ating over multiple columns" example needs a caveat: DataFrame.values will convert every column to a common data type. DataFrame.to_numpy() does this too. Fortunately we can use zip with any number of columns.
– David Wasserman
Jan 16 at 20:44
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Find and replace Android studio
... and hard changed the files after which the project had to be reloaded. Do select "preserve case" or it will mess up everything.
– G_V
Nov 6 '14 at 14:48
4
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NumberPicker 扩展：滑动选择数字，自定义样式 · App Inventor 2 中文网
...显示。可以选择显示在该组件的上方或下方。
SaveSelectedValue保存当前选中值()
保存当前选中的值。
RestoreSavedValue恢复已保存值()
恢复之前保存的值。
GetSelectedValue获取当前选中值()
获取当前选中的值。
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How can I use different certificates on specific connections?
...n, but in the end yours is the approach I took. I had a gruelling task of converting the PEM certificate file to a JKS Java keystore file, and I found assistance for that here: stackoverflow.com/questions/722931/…
– skiphoppy
May 13 '09 at 21:37
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How to style a checkbox using CSS
...ng but CSS. In particular, because CSS now has a widely supported :checked selector, you can make your replacement correctly reflect the checked status of the box.
OLDER ANSWER
Here's a useful article about styling checkboxes. Basically, that writer found that it varies tremendously from browse...
Remove a JSON attribute [duplicate]
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The selected answer would work for as long as you know the key itself that you want to delete but if it should be truly dynamic you would need to use the [] notation instead of the dot notation.
For example:
var keyToDelete = ...