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When is it right for a constructor to throw an exception?
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I realize now that I didn't include a link to the original article, blogs.msdn.com/b/ericlippert/archive/2008/09/10/… Things like ArgumentException/ArgumentNullException are boneheaded: just plain bugs in the calling code. He says "...
Format timedelta to string
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As you know, you can get the total_seconds from a timedelta object by accessing the .seconds attribute.
Python provides the builtin function divmod() which allows for:
s = 13420
hours, remainder = divmod(s, 3600)
minutes, seconds =...
Reverse Range in Swift
...;(Range<Pos>)> {
return (start..<end).reverse()
}
So now I'm allowed to say:
for i in 5>>>1 {print(i)} // 4, 3, 2, 1
This covers just the most common case that occurs in my code, but it is far and away the most common case, so it's all I need at present.
I had a ki...
Complex CSS selector for parent of active child [duplicate]
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The CSS Selectors 4 spec has now included the ability for selectors to ascend. stackoverflow.com/q/1014958/392
– Dan Herbert
Nov 22 '11 at 17:22
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How to print time in format: 2009‐08‐10 18:17:54.811
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It's an even better answer now, and props for looking up how to handle the millisecond part. I think your buffer is now a little longer than it needs to be, though.
– Jack Kelly
Sep 9 '10 at 3:56
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How do I deep copy a DateTime object?
Now $date1 and $date2 contain the same date -- three years from now. I'd like to create two separate datetimes, one which is parsed from a string and one with three years added to it. Currently I've hacked it up like this:
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Does Typescript support the ?. operator? (And, what's it called?)
...mentation can be non-breaking in the future. If they implemented something now, it would end up needing major changes if ECMAScript redefine their specification.
See Optional Chaining Specification
Where something is never going to be standard JavaScript, the TypeScript team can implement as they ...
Asynchronous method call in Python?
...the execution in some queue, or/and call a callback. Otherwise you do not know when it's done (if at all).
– Drakosha
Jun 5 '14 at 22:10
1
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How to delete or add column in SQLITE?
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1 foo bar 25 171
Now you want to remove the column height from this table.
Create another table called new_person
sqlite> CREATE TABLE new_person(
...> id INTEGER PRIMARY KEY,
...> first_name TEXT,
...> last_name ...
Numpy where function multiple conditions
...ue, False, False, False, False, False,
False, False], dtype=bool)
Now you can call np.where on the combined boolean array:
In [239]: np.where((dists >= r) & (dists <= r + dr))
Out[239]: (array([10, 11, 12]),)
In [240]: dists[np.where((dists >= r) & (dists <= r + dr))]
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