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Functional, Declarative, and Imperative Programming [closed]
...ells.
Also, several answers claim that functional programming must be a subset of declarative. On that point it depends if we differentiate "function" from "procedure". Lets handle imperative vs. declarative first.
Definition of declarative expression
The only attribute that can possibly differentia...
Lua简明教程 - 脚本技术 - 清泛IT论坛，有思想、有深度
...本存成一个文件，用如下命令行来运行。>lua file.lua复制代码
或是像shell一样运行：chenhao-air:lua chenhao$ cat hello.lua
#!/usr/local/bin/lua
print("Hello, World")
chenhao-air:lua chenhao$ chmod +x hello.lua
chenhao-air:test chenhao$ ./hello.lua
Hel...
How do Python functions handle the types of the parameters that you pass in?
...a pretty comprehensive collection of type hints, including:
List, Tuple, Set, Map - for list, tuple, set and map respectively.
Iterable - useful for generators.
Any - when it could be anything.
Union - when it could be anything within a specified set of types, as opposed to Any.
Optional - when it...
Sublime Text 2 keyboard shortcut to open file in specified browser (e.g. Chrome)
... I've also had to change last line in Preferences --> PackageSettings--> view in Browser -- > default settings; to "chrome 64" ( was "firefox"). Then works perfectly with any shortcut ;)
– kolboc
Jul 8 '16 at 12:20
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How do I concatenate two lists in Python?
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You can use sets to obtain merged list of unique values
mergedlist = list(set(listone + listtwo))
share
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improve this answer
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How to escape special characters in building a JSON string?
... be double-quoted, according to the specs, so you don't need to escape '.
If you have to use special character in your JSON string, you can escape it using \ character.
See this list of special character used in JSON :
\b Backspace (ascii code 08)
\f Form feed (ascii code 0C)
\n New line
\r Ca...
Fastest way to replace NAs in a large data.table
...h's answers.
require(data.table) # v1.6.6
require(gdata) # v2.8.2
set.seed(1)
dt1 = create_dt(2e5, 200, 0.1)
dim(dt1)
[1] 200000 200 # more columns than Ramnath's answer which had 5 not 200
f_andrie = function(dt) remove_na(dt)
f_gdata = function(dt, un = 0) gdata::NAToUnknown(dt, u...
Remove all special characters from a string [duplicate]
I am facing an issue with URLs, I want to be able to convert titles that could contain anything and have them stripped of all special characters so they only have letters and numbers and of course I would like to replace spaces with hyphens.
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Flags to enable thorough and verbose g++ warnings
Often in C under gcc , I will start with the following set of warning flags (painfully assembled from multiple sources):
5...
How to deal with page breaks when printing a large HTML table
...t;
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Test</title>
<style type="text/css">
table { page-break-inside:auto }
tr { page-break-inside:avoid; page-break-after:auto }
thead { display:table-header-group }
tfoot...