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Finding the number of days between two dates
...stance in seconds between two consecutive midnights is surely not 86400 at least twice a year when daylight saving time comes into play. Comparing two dates across a DST boundary will yield the wrong answer.
So even if you use the "hack" of forcing all date timestamps to a fixed hour, say midnight ...
Is floating-point math consistent in C#? Can it be?
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Is this a problem for C#?
Yes. Different architectures are the least of your worries, different framerates etc. can lead to deviations due to inaccuracies in float representations - even if they are the same inaccuracies (e.g. same architecture, except a slower GPU on one machine).
Can...
What are -moz- and -webkit-? [duplicate]
...s to be safely accounted for. The prefixes will, over time, be removed (at least in theory) as the unprefixed, the final version, of the property is implemented in that browser.
To that end it's usually considered good practice to specify the vendor-prefixed version first and then the non-prefixed ...
What is object slicing?
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This isn't "slicing", or at least a benign variant of it. The real problem occurs if you do B b1; B b2; A& b2_ref = b2; b2 = b1. You might think you have copied b1 to b2, but you haven't! You have copied a part of b1 to b2 (the part of b1 that B inh...
Scala vs. Groovy vs. Clojure [closed]
...ong before the 1.0 in 2007 and has no participated since then. There is at least as much without him in the project as there was with him.
– blackdrag
May 8 '12 at 12:41
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What is the JavaScript >>> operator and how do you use it?
... array object, which cannot be anything besides a non-negative integer (at least in FF), so it is not a possibility here. Also, {} || 1 returns {} so you are no better off if this.length is an object. The benefit to also unary casting this.length in the first method is that it handles cases where th...
Split (explode) pandas dataframe string entry to separate rows
...nd those rows that have empty lists
if (lens == 0).any():
# at least one list in cells is empty
res = (res.append(df.loc[lens==0, idx_cols], sort=False)
.fillna(fill_value))
# revert the original index order
res = res.sort_index()
# reset index if re...
Difference between size_t and unsigned int?
...g etc. do depend on the system: If you take a look at limits.h you will at least under Unices see that the max value for ints depends on the word size of the system.
– Pryftan
Nov 17 '19 at 21:44
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Is there hard evidence of the ROI of unit testing?
...e. With one unit test, you still have your confidence, plus proof that at least one test passes.
That's all it takes. No one needs to know you're doing it. Just do it.
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How can I measure the speed of code written in PHP? [closed]
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You have (at least) two solutions :
The quite "naïve" one is using microtime(true) tobefore and after a portion of code, to get how much time has passed during its execution ; other answers said that and gave examples already, so I won"...