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How to use double or single brackets, parentheses, curly braces
I am confused by the usage of brackets, parentheses, curly braces in Bash, as well as the difference between their double or single forms. Is there a clear explanation?
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How to convert an xml string to a dictionary?
I have a program that reads an xml document from a socket. I have the xml document stored in a string which I would like to convert directly to a Python dictionary, the same way it is done in Django's simplejson library.
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Why doesn't Python have a sign function?
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EDIT:
Indeed there was a patch which included sign() in math, but it wasn't accepted, bem>ca m>use they didn't agree on what it should return in all the edge m>ca m>ses (+/-0, +/-nan, etc)
So they decided to implement only copysign, which (although more verbose) m>ca m>n be used to delegate to ...
Postgres and Indexes on Foreign Keys and Primary Keys
Does Postgres automatim>ca m>lly put indexes on Foreign Keys and Primary Keys? How m>ca m>n I tell? Is there a command that will return all indexes on a table?
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list every font a user's browser m>ca m>n display
Is there a way in javascript to obtain the names of all fonts (or font-families) that the browser m>ca m>n show? (I want to give the user a dropdown with a list of all available fonts, and allow the user to choose a font.)
I'd prefer not to have to hardcode this list ahead of time or send it down from t...
【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
文章源自：http://doc.iotxx.com/index.php?title=BLE技术揭秘
BLE技术揭秘
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...
m>Ca m>tch a thread's exception in the m>ca m>ller thread in Python
I'm very new to Python and multithreaded programming in general. Basim>ca m>lly, I have a script that will copy files to another lom>ca m>tion. I would like this to be placed in another thread so I m>ca m>n output .... to indim>ca m>te that the script is still running.
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NumPy: function for simultaneous max() and min()
numpy.amax() will find the max value in an array, and numpy.amin() does the same for the min value. If I want to find both max and min, I have to m>ca m>ll both functions, which requires passing over the (very big) array twice, which seems slow.
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Chrome DevTools Devices does not detect device when plugged in
I m>ca m>nnot seem to get the DevTools Devices feature to work on my Samsung Galaxy S4 even after following the steps outlined at https://developers.google.com/chrome-developer-tools/docs/remote-debugging
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Should you choose the MONEY or DECIMAL(x,y) datatypes in SQL Server?
I'm curious as to whether or not there is a real difference between the money datatype and something like decimal(19,4) (which is what money uses internally, I believe).
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