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Undocumented NSURLErrorDomain error codes (-1001, -1003 and -1004) using StoreKit
I'm writing StoreKit-related code, and I'm getting some rather troubling error codes when I try to add a purchase to the queue.
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Remove rows with duplicate indices (Pandas DataFrame and TimeSeries)
I'm reading some automated weather data from the web. The observations occur every 5 minutes and are compiled into monthly files for each weather station. Once I'm done parsing a file, the DataFrame looks something like this:
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What is the most effective way for float and double comparison?
What would be the most efficient way to compare two double or two float values?
31 Answers
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What is the difference between vmalloc and kmalloc?
I've googled around and found most people advocating the use of kmalloc , as you're guaranteed to get contiguous physical blocks of memory. However, it also seems as though kmalloc can fail if a contiguous physical block that you want can't be found.
What are the advantages of having a contig...
What's the difference between backtracking and depth first search?
What's the difference between backtracking and depth first search?
13 Answers
13
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How do I convert a String object into a Hash object?
I have a string which looks like a hash:
13 Answers
13
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Elegant way to invert a map in Scala
...o some inverted value->key lookups. I was looking for a simple way to do this, but came up with only:
10 Answers
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Unable to verify leaf signature
I'm using node.js request.js to reach an api. I'm getting this error
14 Answers
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bpftrace教程【官方】 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...通过管道传递给grep，进行完整的正则表达式搜索。
2. Hello World
# bpftrace -e 'BEGIN { printf("hello world\n"); }'
Attaching 1 probe...
hello world
^C
打印欢迎消息。 运行后, 按Ctrl-C结束。
BEGIN是一个特殊的探针，在程序开始的执行触...
read.csv warning 'EOF within quoted string' prevents complete reading of file
I have a CSV file (24.1 MB) that I cannot fully read into my R session. When I open the file in a spreadsheet program I can see 112,544 rows. When I read it into R with read.csv I only get 56,952 rows and this warning:
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