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case-insensitive list sorting, without lowercasing the result?
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In Python 3.3+ there is the str.casefold method that's specifically designed for caseless matching:
sorted_list = sorted(unsorted_list, key=str.casefold)
In Python 2 use lower():
sorted_list = sorted(unsorted_list, key=lambda s: s.lower())
It works for both normal and unicode s...
counting number of directories in a specific directory
How to count the number of folders in a specific directory. I am using the following command, but it always provides an extra one.
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How to control the line spacing in UILabel
...adding something new to this answer, so I don't feel as bad... Here is a Swift answer:
import Cocoa
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineSpacing = 40
let attrString = NSMutableAttributedString(string: "Swift Answer")
attrString.addAttribute(.paragraphStyle, value:para...
What is the difference between javac and the Eclipse compiler?
...javac program is wrapped around, or is it a separate compiler altogether? If the latter, why would they reinvent the wheel?
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How to get last inserted row ID from WordPress database?
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"This function returns false if the row could not be inserted. Otherwise, it returns the number of affected rows (which will always be 1)." From: codex.wordpress.org/Function_Reference/wpdb_Class#INSERT_rows
– unbreak
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boost::filesystem指南 - C/C++ - 清泛网 - 专注C/C++及内核技术
..."; //path重载了 / 运算符
//判断文件存在性
if(bf::exists(path))
{
std::ofstream out(path.file_string().c_str());
if(!out) return 1;
out << "一个测试文件\n";
} else {
std::cout ...
How to construct a set out of list items in python?
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If you have a list of hashable objects (filenames would probably be strings, so they should count):
lst = ['foo.py', 'bar.py', 'baz.py', 'qux.py', Ellipsis]
you can construct the set directly:
s = set(lst)
In fact, set ...
Bash script processing limited number of commands in parallel
...manual:
wait [jobspec or pid ...]
Wait until the child process specified by each process ID pid or job specification jobspec exits and return the exit status of the last
command waited for. If a job spec is given, all processes in the job
are waited for. If no arguments are given, all cu...
PostgreSQL return result set as JSON array?
...then converts the array to a JSON array.
I wasn't able to discern any significant performance difference between the two.
Object of lists
This section describes how to generate a JSON object, with each key being a column in the table and each value being an array of the values of the column. It's...
Extract a substring from a string in Ruby using a regular expression
...string>"[/.*<([^>]*)/,1]
=> "substring"
No need to use scan, if we need only one result.
No need to use Python's match, when we have Ruby's String[regexp,#].
See: http://ruby-doc.org/core/String.html#method-i-5B-5D
Note: str[regexp, capture] → new_str or nil
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