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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)
...
C++ Modules - why were they removed from C++0x? Will they be back later on?
...ion have been published by WG21 on open-std.org. I will link only to the latest documents here:
Working Draft, Extensions to C++ for Modules N4610 (October 2016).
Fourth revision published as P0142R0 (March 2016).
Wording for Modules published as P0143R2 (March 2016).
The clang team has published ...
Why create “Implicitly Unwrapped Optionals”, since that implies you know there's a value?
... if a variable is nil when accessed, it would be a waste of time to bother testing it for nil. Normally if you have a condition that must absolutely be true for your app to continue running, you would use an assert. An Implicitly Unwrapped Optional has an assert for nil built right into it. Even the...
Can I unshelve to a different branch in tfs 2008?
...he sourcecontrol be sure to verify the path is correct for the new branch.
Test - and then checkin the new files
Important: I've found that if you don't first take TFS offline then you'll end up with any new files (from your unshelves changeset) showing without a little red check mark and you'll h...
Should one call .close() on HttpServletResponse.getOutputStream()/.getWriter()?
...ally happening, but I guess that out.close() prevents the error handling.
Tested with Tomcat 7.0.50, Java EE 6 using Netbeans 7.4.
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What is a stream?
...nging UNIX linefeeds to DOS ones, or whatever). Pipes are another thorough test of the metaphor: that's where you create a pair of streams such that anything you write into one can be read out of the other. Think wormholes :-)
...
What's the difference between returning void and returning a Task?
...completed too early.
Another context is the AsyncContext I wrote for unit testing (available here) - the AsyncContext.Run method tracks the outstanding operation count and returns when it's zero.
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What is the bower (and npm) version syntax?
...r calculator you can play with, making all of this much easier to grok and test.
SemVer isn't just a syntax! It has some pretty interesting things to say about the right ways to publish API's, which will help to understand what the syntax means. Crucially:
Once you identify your public API, yo...
How is Math.Pow() implemented in .NET Framework?
...s:
I've tried some workarounds on a coding platform which has an extensive test coverage cases, and found a very effective way doing it(Solution 3):
public double MyPow(double x, int n) {
double res = 1;
/* Solution 1: iterative : TLE(Time Limit Exceeded)
double res = 1;
var len = n ...
What would a “frozen dict” be?
...unctions are based on the key only. This code has also been formally unit-tested, unlike what I posted here in August 2014.
MIT-style license.
if 3 / 2 == 1:
version = 2
elif 3 / 2 == 1.5:
version = 3
def col(i):
''' For binding named attributes to spots inside subclasses of tuple.''...