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How to convert list of tuples to multiple lists?
...87597s
Running it multiple times, append is 3x - 4x faster than zip! The test script is here:
#!/usr/bin/env python3
import time
N = 2000000
xs = list(range(1, N))
ys = list(range(N+1, N*2))
zs = list(zip(xs, ys))
t1 = time.time()
xs_, ys_ = zip(*zs)
print(len(xs_), len(ys_))
t2 = time.time()...
Evaluating a mathematical expression in a string
... "sgn": lambda a: abs(a) > epsilon and cmp(a, 0) or 0}
def evaluateStack(self, s):
op = s.pop()
if op == 'unary -':
return -self.evaluateStack(s)
if op in "+-*/^":
op2 = self.evaluateStack(s)
op1 = self.evaluateStack(s)
...
How to build for armv6 and armv7 architectures with iOS 5
...r that allows the app to run without crashing under iOS4. Specifically, we tested for iOS5 capabilities before trying to use them, and linked iOS5-only libraries as Optional.
So, supporting iPhone3G in an iOS5 world could just as easily mean "we want our app to run on iOS4 and above (regardless of ...
How to write :hover condition for a:before and a:after?
... span {
font-size:12px;
}
a {
color:green;
}
.test1>a:hover span {
display:none;
}
.test1>a:hover:before {
color:red;
content:"Apple";
}
</style>
</head>
<body>
<div class="test1">
<a href="#"&...
Using the Underscore module with Node.js
...ry's use of the same variable. Try something like this:
Admin-MacBook-Pro:test admin$ node
> _und = require("./underscore-min")
{ [Function]
_: [Circular],
VERSION: '1.1.4',
forEach: [Function],
each: [Function],
map: [Function],
inject: [Function],
(...more functions...)
templat...
List all the modules that are part of a python package?
...or: "AttributeError: 'module' object has no attribute '_path_'" - I didn't test it with 'scipy' but with a few other packages. Has this anything to do with Python version? ( I use Python 2.7)
– Apostolos
Feb 23 '18 at 21:51
...
Get specific object by id from array of objects in AngularJS
...ns the value of the first element in the array that satisfies the provided testing function.
– abosancic
Jul 20 '17 at 13:12
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Timeout a command in bash without unnecessary delay
...ead is negligible. I doubt that would make tlrbsf run noticeably longer. I tested with sleep 30, and got 0.000ms difference between using and not using it.
– Juliano
Mar 27 '09 at 0:36
...
Check if a Windows service exists and delete in PowerShell
...nly if the name exactly matches the $ServiceName.
# This way you can test if the array is emply.
if ( Get-Service "$ServiceName*" -Include $ServiceName ) {
$Return = $True
}
Return $Return
}
[bool] $thisServiceExists = ServiceExists "A Service Name"
$thisServiceExists
B...
Why is pow(a, d, n) so much faster than a**d % n?
I was trying to implement a Miller-Rabin primality test , and was puzzled why it was taking so long (> 20 seconds) for midsize numbers (~7 digits). I eventually found the following line of code to be the source of the problem:
...