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How can I convert a hex string to a byte array? [duplicate]
....
public static byte[] StringToByteArrayFastest(string hex) {
if (hex.Length % 2 == 1)
throw new Exception("The binary key cannot have an odd number of digits");
byte[] arr = new byte[hex.Length >> 1];
for (int i = 0; i < hex.Length >> 1; ++i...
Change the image source on rollover using jQuery
...on() {
var src = $(this).attr("src").match(/[^\.]+/) + "over.gif";
$(this).attr("src", src);
})
.mouseout(function() {
var src = $(this).attr("src").replace("over.gif", ".gif");
$(this).attr("src", src);
});
});
For those tha...
jQuery get selected option value (not the text, but the attribute 'value')
...lter is better then using :selected selector directly in the first query.
If inside a change handler, you could use simply this.value to get the selected option value. See demo for more options.
//ways to retrieve selected option and text outside handler
console.log('Selected option value ' +...
Setting DEBUG = False causes 500 Error
... need to add:
# Hosts/domain names that are valid for this site; required if DEBUG is False
# See https://docs.djangoproject.com/en/1.9/ref/settings/#allowed-hosts
ALLOWED_HOSTS = []
Add your host here like ['www.beta800.net'] or ['*'] for a quick test, but don't use ['*'] for production.
...
Get exception description and stack trace which caused an exception, all as a string
...
See the traceback module, specifically the format_exc() function. Here.
import traceback
try:
raise ValueError
except ValueError:
tb = traceback.format_exc()
else:
tb = "No error"
finally:
print tb
...
SensorUtil 传感器工具扩展：在后台和屏幕关闭时保持传感器工作 · App Inv...
... 权限要求
通知权限：Android 13+ 需要 POST_NOTIFICATIONS 权限才能显示通知
电池优化豁免：要在打盹模式下运行，需要请求忽略电池优化
设计器属性
UrsAI2SensorUtil 组件参考
...
Import / Export database with SQL Server Server Management Studio
..., Tasks -> Generate Scripts...
Then follow the wizard.
For SSMS2008+, if you want to also export the data, on the "Set Scripting Options" step, select the "Advanced" button and change "Types of data to script" from "Schema Only" to "Data Only" or "Schema and Data".
...
Changing font size and direction of axes text in ggplot2
....text.x = element_text(angle=90, hjust=1))
#vjust adjust the vertical justification of the labels, which is often useful
There's lots of good information about how to format your ggplots here. You can see a full list of parameters you can modify (basically, all of them) using ?theme.
...
PHP array: count or sizeof?
...
I would use count() if they are the same, as in my experience it is more common, and therefore will cause less developers reading your code to say "sizeof(), what is that?" and having to consult the documentation.
I think it means sizeof() does...
Is a colon `:` safe for friendly-URL use?
We are designing a URL system that will specify application sections as words separated by slashes. Specifically, this is in GWT, so the relevant parts of the URL will be in the hash (which will be interpreted by a controller layer on the client-side):
...