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O(nlogn) Algorithm - Find three evenly spaced ones within binary string
...idea of thinking of 11011 as the polynomial with coefficients [1,1,0,1,1], etc. This is a clever and often useful idea, which goes all the way back to Euler. [See Wilf's awesome book "generatingfunctionology" for a modern exposition: math.upenn.edu/~wilf/DownldGF.html ] So it depends on whether the ...
Why should I use Google's CDN for jQuery?
...ts rather than load it from a CDN.
The reason is the latency involved in fetching jQuery on mobile devices:
"In 2012 the average RTT time on a mobile network in the United States
was 344ms. And that 344ms applies to not only every HTTP request –
which the average web page now makes 93 of ...
Ruby - test for array
...ant to check if something is an indexed iterable, so arrays, linked lists, etc. would be cool, but I don't want key value stores like hashes?
– Colton Voege
Jan 8 '17 at 3:52
...
Java String - See if a string contains only numbers and not letters
...s and decimals included). For example, it will match 1, 10, 1.0, -1, -1.0, etc. It'll also match on "1." but that can often be parsed anyway.
– user358089
Dec 4 '14 at 19:59
...
What exactly is a reentrant function?
...able and correct (no dangling pointers, no contradicting member variables, etc.).
7.3. Make sure all your objects are correctly encapsulated
No one else should have access to their internal data:
// bad
int & MyObject::getCounter()
{
return this->counter;
}
// ...
Unicode equivalents for \w and \b in Java regular expressions?
...change the API from what it is in this alpha prototype, clean up the code, etc. But it helps us out tremendously, and we figure it will help others, too. I really wish Sun would do something about their library, but Oracle inspires no confidence.
– tchrist
Nov ...
Remove Identity from a column in a table
...pt the table to be created; rename everything e.g. 'MyTable2', 'MyIndex2', etc.
Remove the IDENTITY specification.
You should now have two "identical"-ish tables, one full, the other empty with no IDENTITY.
Run ALTER TABLE [Original] SWITCH TO [Original2]
Now your original table will be empty and th...
Change one value based on another value in pandas
...eration which is overridden for series. Fancy string formatting, f-strings etc won't work here since the + applies to scalars and not 'primitive' values:
df['description'] = 'A ' + df.age.astype(str) + ' years old ' \
+ df.type + ' ' + df.animal
In [2]: df
Out[2]:
animal ...
How to check for a valid Base64 encoded string
... // Base64 string's length is always divisible by four, i.e. 8, 16, 20 etc.
// If it is not you can return false. Quite effective
// Further, if it meets the above criterias, then test for spaces.
// If it contains spaces, it is not base64
if (value == null || va...
How do I write a correct micro-benchmark in Java?
... iterations.)
Rule 2: Always run with -XX:+PrintCompilation, -verbose:gc, etc., so you can verify that the compiler and other parts of the JVM are not doing unexpected work during your timing phase.
Rule 2.1: Print messages at the beginning and end of timing and warmup phases, so you can verify th...