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how to return index of a sorted list? [duplicate]
...d do:
L = [2,3,1,4,5]
from operator import itemgetter
indices, L_sorted = zip(*sorted(enumerate(L), key=itemgetter(1)))
list(L_sorted)
>>> [1, 2, 3, 4, 5]
list(indices)
>>> [2, 0, 1, 3, 4]
Or, for Python <2.4 (no itemgetter or sorted):
temp = [(v,i) for i,v in enumerate(L)]
...
MaterialDialog 对话框增强扩展 · App Inventor 2 中文网
...屉菜单、日期/时间选择器、列表对话框等新功能。
.aix 拓展下载：
MaterialDialog_v3.aix
.aia 示例项目下载：
MaterialDialog_dialogs.aia
版权声明
本文档翻译整理自 MIT App Inventor 社区原帖，版权归原作者 Black_Kn...
How to extract the n-th elements from a list of tuples?
...
This also works:
zip(*elements)[1]
(I am mainly posting this, to prove to myself that I have groked zip...)
See it in action:
>>> help(zip)
Help on built-in function zip in module builtin:
zip(...)
zip(seq1 [, seq2...
StringUtils 字符串工具扩展：强大的文本处理工具集 · App Inventor 2 中文网
...操作
LeftOf("Hello", 3)
下载
.aix拓展文件：
de.ullisroboterseite.ursai2stringutils.aix
.aia示例文件：
StringUtilsTest.aia
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1.0
...
Add SUM of values of two LISTS into new LIST
...
The zip function is useful here, used with a list comprehension.
[x + y for x, y in zip(first, second)]
If you have a list of lists (instead of just two lists):
lists_of_lists = [[1, 2, 3], [4, 5, 6]]
[sum(x) for x in zip(*li...
How to import CSV file data into a PostgreSQL table?
...t article.
Solution paraphrased here:
Create your table:
CREATE TABLE zip_codes
(ZIP char(5), LATITUDE double precision, LONGITUDE double precision,
CITY varchar, STATE char(2), COUNTY varchar, ZIP_CLASS varchar);
Copy data from your CSV file to the table:
COPY zip_codes FROM '/path/to/csv...
How do I zip two arrays in JavaScript? [duplicate]
...otype.map()
const a = [1, 2, 3],
b = ['a', 'b', 'c'];
const zip = (arr1, arr2) => arr1.map((k, i) => [k, arr2[i]]);
console.log(zip(a, b)) // [[1, "a"], [2, "b"], [3, "c"]]
Using for loop
var a = [1, 2, 3],
b = ['a', 'b', 'c'];
var zip = [];
for (var i = ...
Finding differences between elements of a list
...
>>> t
[1, 3, 6]
>>> [j-i for i, j in zip(t[:-1], t[1:])] # or use itertools.izip in py2k
[2, 3]
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...
Programmatically find the number of cores on a machine
...&sysinfo);
int numCPU = sysinfo.dwNumberOfProcessors;
Linux, Solaris, AIX and Mac OS X >=10.4 (i.e. Tiger onwards)
int numCPU = sysconf(_SC_NPROCESSORS_ONLN);
FreeBSD, MacOS X, NetBSD, OpenBSD, etc.
int mib[4];
int numCPU;
std::size_t len = sizeof(numCPU);
/* set the mib for hw.ncpu */
...
Where to find Java JDK Source Code? [closed]
... So I want the JDK Source Code.
Before I re-installed Linux I had the src.zip package with all the official source code in it. I just had to tell Eclipse where this file is and I could see the code. But now I don't have the file anymore...
...