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How can I get nth element from a list?
...
!! is an unsafe partially defined function, provoking a crash for out-of-range indices. Be aware that the standard library contains some such partial functions (head, last, etc.). For safety, use an option type Maybe, or the Safe module.
Example of a reasonably efficient, robust total (for indice...
How to compare if two structs, slices or maps are equal?
...) != len(b.Z) || len(a.M) != len(b.M) {
return false
}
for i, v := range a.Z {
if b.Z[i] != v {
return false
}
}
for k, v := range a.M {
if b.M[k] != v {
return false
}
}
return true
}
...
BLE协议—广播和扫描 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...sp; /* 设备安全管理OOB标志 */
BLE_AD_TYPE_INT_RANGE = 0x12, /* 设备连接参数范围 */
BLE_AD_TYPE_SOL_SRV_UUID = 0x14,&nbs...
C++11 features in Visual Studio 2012
...Strong compare and exchange
Bi-directional fences
Data-dependency ordering
Range-based for loop
In early November 2012, Microsoft announced the Visual C++ Compiler November 2012 CTP, which adds more C++11 functionality to Visual Studio 2012:
uniform initialization
initializer lists
variadic tem...
What's the simplest way to subtract a month from a date in Python?
...-1])
return date.replace(day=d,month=m, year=y)
>>> for m in range(-12, 12):
print(monthdelta(datetime.now(), m))
2009-08-06 16:12:27.823000
2009-09-06 16:12:27.855000
2009-10-06 16:12:27.870000
2009-11-06 16:12:27.870000
2009-12-06 16:12:27.870000
2010-01-06 16:12:27.870000
...
How many parameters are too many? [closed]
... <algorithm> takes more than 3 parameters, because just one iterator range is 2 already. It's just the nature of programming with iterators (i.e. generic programming with STL collections).
– Steve Jessop
Nov 27 '08 at 13:49
...
Is there a way to automatically build the package.json file for Node.js projects
...on's dependencies list.
(Note: You may need to manually tweak the version ranges for your dependencies.)
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Read error response body in Java
In Java, this code throws an exception when the HTTP result is 404 range:
8 Answers
8
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Replacing all non-alphanumeric characters with empty strings
...e that [^a-zA-Z] will replace characters not being itself in the character range A-Z/a-z. That means special characters like é, ß etc. or cyrillic characters and such will be removed.
If the replacement of these characters is not wanted use pre-defined character classes instead:
str.replaceAl...
How can I check if a string represents an int, without using try/except?
...digit()
def timeFunc(func, times):
t1 = time.time()
for n in range(times):
for v in testvals:
r = func(v)
t2 = time.time()
return t2 - t1
def testFuncs(funcs):
for func in funcs:
sys.stdout.write( "\t%s\t|" % func.__name__)
print()
for ...