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TypeError: ObjectId('') is not JSON serializable
...an aggregated function on document using Python, It returns valid response and i can print it but can not return it.
16 Ans...
JavaScript arrays braces vs brackets
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The first and third are equivalent and create a new array. The second creates a new empty object, not an array.
var myArray = []; //create a new array
var myArray = {}; //creates **a new empty object**
var myArray = new Array(); //cre...
Best way to generate random file names in Python
In Python, what is a good, or the best way to generate some random text to prepend to a file(name) that I'm saving to a server, just to make sure it does not overwrite. Thank you!
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How do I handle the window close event in Tkinter?
How do I handle the window close event (user clicking the 'X' button) in a Python Tkinter program?
6 Answers
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The forked VM terminated without saying properly goodbye. VM crash or System.exit called
Please help me to solve this issue. I do not exactly understand what the error in the log means.
48 Answers
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How do I iterate over an NSArray?
I'm looking for the standard idiom to iterate over an NSArray. My code needs to be suitable for OS X 10.4+.
8 Answers
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What is the difference between new/delete and malloc/free?
What is the difference between new / delete and malloc / free ?
15 Answers
15
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Get bitcoin historical data [closed]
...bitcoincharts.com/v1/csv/
it is updated twice a day for active exchanges, and there is a few dead exchanges, too.
EDIT: Since there are no column headers in the CSVs, here's what they are :
column 1) the trade's timestamp,
column 2) the price,
column 3) the volume of the trade
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querySelector and querySelectorAll vs getElementsByClassName and getElementById in JavaScript
... would like to know what exactly is the difference between querySelector and querySelectorAll against getElementsByClassName and getElementById ?
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libcurl的使用总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...入门的朋友指引。
一.下载安装
1.到http://curl.haxx.se/download.html上下载最新版本，由于公司的机器安装rpm有依赖关系，所以直接下载了source
2.编译。解压后进入curl的目录，直接执行 make all 就行。
3.等待编译结束后，可...