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PHP substring extraction. Get the string before the first '/' or the whole string
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Use explode()
$arr = explode("/", $string, 2);
$first = $arr[0];
In this case, I'm using the limit parameter to explode so that php won't scan the string any more than what's needed.
share
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How to round up to the nearest 10 (or 100 or X)?
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If you just want to round up to the nearest power of 10, then just define:
roundUp <- function(x) 10^ceiling(log10(x))
This actually also works when x is a vector:
> roundUp(c(0.0023, 3.99, 10, 1003))
[1] 1e-02 1e+01 1e+01 1e+04
..but if you want to round to a "nice"...
How to ISO 8601 format a Date with Timezone Offset in JavaScript?
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10 Answers
10
Active
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Redirect using AngularJS
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109
With an example of the not-working code, it will be easy to answer this question, but with this...
Read Excel File in Python
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70
This is one approach:
from xlrd import open_workbook
class Arm(object):
def __init__(self,...
Algorithm to find Largest prime factor of a number
... very fast in general.
The best known method for factoring numbers up to 100 digits long is the Quadratic sieve. As a bonus, part of the algorithm is easily done with parallel processing.
Yet another algorithm I've heard of is Pollard's Rho algorithm. It's not as efficient as the Quadratic Sieve i...
In SQL, how can you “group by” in ranges?
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Neither of the highest voted answers are correct on SQL Server 2000. Perhaps they were using a different version.
Here are the correct versions of both of them on SQL Server 2000.
select t.range as [score range], count(*) as [number of occurences]
from (
select case
when score bet...
Truncate (not round) decimal places in SQL Server
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edited Oct 10 '18 at 16:03
Paul
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ans...
Deleting elements from std::set while iterating
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180
This is implementation dependent:
Standard 23.1.2.8:
The insert members shall not affect th...