我有3个或更多阵列：
### Warning: Using unoptimized lapack ###
### Warning: Using unoptimized lapack ###
warning: no previously-included files matching '*.pyo' found anywhere in dis
tribution
warning: no previously-included files matching '*.pyd' found anywhere in dis
tribution
objdump.exe: C:\Windows\winsxs\amd64_microsoft.vc90.crt_1fc8b3b9a1e18e3b_9.0
.21022.8_none_750b37ff97f4f68b\msvcr90.dll: File format not recognized
Looking for python27.dll
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "c:\users\22193\appdata\local\temp\pip-build-aoxj5g\scipy\setup.py",
line 415, in <module>
setup_package()
File "c:\users\22193\appdata\local\temp\pip-build-aoxj5g\scipy\setup.py",
line 411, in setup_package
setup(**metadata)
File "c:\python27\lib\distutils\core.py", line 111, in setup
_setup_distribution = dist = klass(attrs)
File "build\bdist.win-amd64\egg\setuptools\dist.py", line 269, in __init__
File "build\bdist.win-amd64\egg\setuptools\dist.py", line 313, in fetch_bu
ild_eggs
File "build\bdist.win-amd64\egg\pkg_resources\__init__.py", line 826, in r
esolve
File "build\bdist.win-amd64\egg\pkg_resources\__init__.py", line 1092, in
best_match
File "build\bdist.win-amd64\egg\pkg_resources\__init__.py", line 1104, in
obtain
File "build\bdist.win-amd64\egg\setuptools\dist.py", line 380, in fetch_bu
ild_egg
File "build\bdist.win-amd64\egg\setuptools\command\easy_install.py", line
640, in easy_install
File "build\bdist.win-amd64\egg\setuptools\command\easy_install.py", line
670, in install_item
File "build\bdist.win-amd64\egg\setuptools\command\easy_install.py", line
850, in install_eggs
File "build\bdist.win-amd64\egg\setuptools\command\easy_install.py", line
1078, in build_and_install
File "build\bdist.win-amd64\egg\setuptools\command\easy_install.py", line
1064, in run_setup
File "build\bdist.win-amd64\egg\setuptools\sandbox.py", line 246, in run_s
etup
File "c:\python27\lib\contextlib.py", line 35, in __exit__
self.gen.throw(type, value, traceback)
File "build\bdist.win-amd64\egg\setuptools\sandbox.py", line 195, in setup
_context
File "c:\python27\lib\contextlib.py", line 35, in __exit__
self.gen.throw(type, value, traceback)
File "build\bdist.win-amd64\egg\setuptools\sandbox.py", line 166, in save_
modules
File "build\bdist.win-amd64\egg\setuptools\sandbox.py", line 141, in resum
e
File "build\bdist.win-amd64\egg\setuptools\sandbox.py", line 154, in save_
modules
File "build\bdist.win-amd64\egg\setuptools\sandbox.py", line 195, in setup
_context
File "build\bdist.win-amd64\egg\setuptools\sandbox.py", line 243, in run_s
etup
File "build\bdist.win-amd64\egg\setuptools\sandbox.py", line 273, in run
File "build\bdist.win-amd64\egg\setuptools\sandbox.py", line 242, in runne
r
File "build\bdist.win-amd64\egg\setuptools\sandbox.py", line 46, in _execf
ile
File "c:\users\22193\appdata\local\temp\easy_install-3hk03b\numpy-1.11.2\s
etup.py", line 386, in <module>
# Raise errors for unsupported commands, improve help output, etc.
File "c:\users\22193\appdata\local\temp\easy_install-3hk03b\numpy-1.11.2\s
etup.py", line 378, in setup_package
test_suite='nose.collector',
File "c:\users\22193\appdata\local\temp\easy_install-3hk03b\numpy-1.11.2\n
umpy\distutils\core.py", line 169, in setup
File "c:\python27\lib\distutils\core.py", line 151, in setup
dist.run_commands()
File "c:\python27\lib\distutils\dist.py", line 953, in run_commands
self.run_command(cmd)
File "c:\python27\lib\distutils\dist.py", line 972, in run_command
cmd_obj.run()
File "build\bdist.win-amd64\egg\setuptools\command\bdist_egg.py", line 160
, in run
File "c:\python27\lib\distutils\cmd.py", line 326, in run_command
self.distribution.run_command(command)
File "c:\python27\lib\distutils\dist.py", line 972, in run_command
cmd_obj.run()
File "c:\users\22193\appdata\local\temp\easy_install-3hk03b\numpy-1.11.2\n
umpy\distutils\command\build_clib.py", line 83, in run
File "c:\users\22193\appdata\local\temp\easy_install-3hk03b\numpy-1.11.2\n
umpy\distutils\ccompiler.py", line 596, in new_compiler
File "c:\users\22193\appdata\local\temp\easy_install-3hk03b\numpy-1.11.2\n
umpy\distutils\mingw32ccompiler.py", line 96, in __init__
File "c:\users\22193\appdata\local\temp\easy_install-3hk03b\numpy-1.11.2\n
umpy\distutils\mingw32ccompiler.py", line 360, in build_msvcr_library
File "c:\users\22193\appdata\local\temp\easy_install-3hk03b\numpy-1.11.2\n
umpy\distutils\mingw32ccompiler.py", line 274, in generate_def
ValueError: Symbol table not found
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in c:\users\22193\ap
pdata\local\temp\pip-build-aoxj5g\scipy\
C:\Python27\Scripts>
想要获得1个合并数组，其结果如下：
var array1 = [a,b,c];
var array2 = [c,d];
var array3 = [e,f];
我该怎么办？请注意：数组输入不受限制。
答案 0 :(得分：4)
您可以使用组合算法的迭代和递归方法。
function combine(array) {
function c(part, index) {
array[index].forEach(function (a) {
var p = part.concat([a]);
if (p.length === array.length) {
r.push(p.join(''));
return;
}
c(p, index + 1);
});
}
var r = [];
c([], 0);
return r;
}
console.log(combine([['a', 'b', 'c'], ['c', 'd'], ['e', 'f']]));
console.log(combine([['a', 'b', 'c'], ['d', 'e'], ['f', 'g'], ['h', 'i', 'j']]));.as-console-wrapper { max-height: 100% !important; top: 0; }
答案 1 :(得分：2)
尝试使用for循环 Jsfiddle
var array1 = ["a", "b", "c"];
var array2 = ["c", "d"];
var array3 = ["e", "f"];
var result = [], pushresult = 0;
for (var i = 0; i < array1.length; i++) {
for (var j = 0; j < array2.length; j++) {
for (var k = 0; k < array3.length; k++) {
pushresult = array1[i] + array2[j] + array3[k];
result.push(pushresult);
}
}
}
console.log(result);
答案 2 :(得分：2)
您似乎正在尝试从多个阵列（集合）中获取 笛卡尔积 。
使用Array.concat考虑以下ES6解决方案，Array.reduce和Array.map函数：
const flatten = (arr) => [].concat.apply([], arr);
const product = (...sets) =>
sets.reduce((acc, set) =>
flatten(acc.map(x => set.map(y => [ ...x, y ]))),
[[]]);
var array1 = ['a', 'b', 'c'],
array2 = ['c','d'],
array3 = ['e','f'];
result = product(array1, array2, array3);
console.log(JSON.stringify(result));
答案 3 :(得分：0)
if you number of array is fixed (not array element) then you can use
<script>
var array1 = ["a","b","c"];
var array2 = ["c","d"];
var array3 = ["e","f"];
var d=[];
for(i in array1){
for (j in array2){
for(k in array3){
d.push(array1[i]+array2[j]+array3[k]);
}
}
}
alert(d);
</script>
答案 4 :(得分：0)
List applicative和monad可以轻松实现这一目标
// Array Applicative
Array.prototype.ap = function ( ...args )
{
const loop = ( acc , [ x , ...xs ] ) =>
x === undefined
? [ this [ 0 ] ( ...acc ) ]
: x.chain ( a =>
loop ( acc.concat ( [ a ] ) , xs ) )
return loop ( [] , args )
}
// Array Monad
Array.prototype.chain = function chain (f)
{
return this.reduce ( ( acc , x ) =>
acc.concat ( f (x) ), [] )
}
// the hard work is already done
const combinations = ( ...xxs ) =>
[ ( ...xs ) => xs ] .ap ( ...xxs )
console.log ( combinations ( array1 , array2 , array3 ) )
// [ [ 'a1', 'a2', 'a3' ],
// [ 'a1', 'a2', 'b3' ],
// [ 'a1', 'a2', 'c3' ],
// [ 'a1', 'b2', 'a3' ],
// [ 'a1', 'b2', 'b3' ],
// [ 'a1', 'b2', 'c3' ],
// [ 'b1', 'a2', 'a3' ],
// [ 'b1', 'a2', 'b3' ],
// [ 'b1', 'a2', 'c3' ],
// [ 'b1', 'b2', 'a3' ],
// [ 'b1', 'b2', 'b3' ],
// [ 'b1', 'b2', 'c3' ],
// [ 'c1', 'a2', 'a3' ],
// [ 'c1', 'a2', 'b3' ],
// [ 'c1', 'a2', 'c3' ],
// [ 'c1', 'b2', 'a3' ],
// [ 'c1', 'b2', 'b3' ],
// [ 'c1', 'b2', 'c3' ],
// [ 'd1', 'a2', 'a3' ],
// [ 'd1', 'a2', 'b3' ],
// [ 'd1', 'a2', 'c3' ],
// [ 'd1', 'b2', 'a3' ],
// [ 'd1', 'b2', 'b3' ],
// [ 'd1', 'b2', 'c3' ] ]
答案 5 :(得分：0)
对于无限数量的数组，您似乎需要Array.prototype.cartesian()。它可以按如下方式完成;
Array.prototype.cartesian = function(...a){
return a.length ? this.reduce((p,c) => (p.push(...a[0].cartesian(...a.slice(1)).map(e => a.length > 1 ? [c,...e] : [c,e])),p),[])
: this;
};
var arr1 = ["a","b","c"],
arr2 = ["c","d"],
arr3 = ["e","f"],
result = arr1.cartesian(arr2,arr3);
console.log(JSON.stringify(result));