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Is there a math nCr function in python? [duplicate]
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The following program calculates nCr in an efficient manner (compared to calculating factorials etc.)
import operator as op
from functools import reduce
def ncr(n, r):
r = min(r, n-r)
numer = reduce(op.mul, range(n, n-r, -1), 1)
denom = reduce(op.mul, range(1, r+1), 1)
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When and why should I use a namedtuple instead of a dictionary? [duplicate]
...es. The field name properties are stored in the namedtuple class." twitter.com/raymondh/status/524660721968107521
– Moberg
Oct 31 '14 at 7:48
3
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c/c++如何获取CPU的序列号？ - C/C++ - 清泛网 - 专注C/C++及内核技术
...回的是扩展信息。
继续了解请参考：https://www.tsingfun.com/it/cpp/1965.html
运行结果：
CPU 序列号 cpuid
Google breakpad stackwalker无法加载符号 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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binary = sys.argv[i]
outputFile = basename(binary) + ".sym"
command = '{0} {1} > {2}'.format("dump_syms",binary,outputFile)
print ('--> Running {0}'.format(command) )
os.system(command)
symFile = open(outputFile, 'r')
firstLine = symFile.readline()
print ('First l...
【解决】Python：ModuleNotFoundError: No module named \'google.protobuf...
...ckages
touch google/__init__.py
参考资料：https://stackoverflow.com/questions/38680593/importerror-no-module-named-google-protobuf
python,protobuf
Stateless and Stateful Enterprise Java Beans
...u need to perform a JNDI lookup and store the returned EJB instance in the HttpSession object for future activity. Something like that:
try {
InitialContext ctx = new InitialContext();
myStateful = (MyStateful)ctx.lookup("java:comp/env/MyStatefulBean");
session.setAttribute("my_stateful...
Node.js: How to send headers with form data using request module?
... 'Content-Type': 'application/x-www-form-urlencoded'
},
uri: 'http://myUrl',
body: formData,
method: 'POST'
}, function (err, res, body) {
//it works!
});
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Is it alright to use target=“_blank” in HTML5?
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Programmatically retrieve memory usage on iPhone
... you can do something like the example below. However, you really should become familiar with the various profiling tools as well as they are designed to give you a much better picture of usage over-all.
#import <mach/mach.h>
// ...
void report_memory(void) {
struct task_basic_info info;
...