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How do I get the first n characters of a string without checking the size or going out of bounds?
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Here's a neat solution:
String upToNCharacters = s.substring(0, Math.min(s.length(), n));
Opinion: while this solution is "neat", I think it is actually less readable than a solution that uses if / else in the obvious way. If the reader hasn't seen this trick, he/she has to think ...
How to split a comma-separated value to columns
...R(MAX)
)
AS
BEGIN
DECLARE @value NVARCHAR(MAX),
@pos INT = 0,
@len INT = 0
SET @string = CASE
WHEN RIGHT(@string, 1) != @delimiter
THEN @string + @delimiter
ELSE @string
END
WHILE CHARINDEX(@delimiter, @string, @p...
Detecting Unsaved Changes
... |
edited Apr 6 '14 at 20:25
Dave Jarvis
27.6k3535 gold badges157157 silver badges281281 bronze badges
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Calculate age given the birth date in the format YYYYMMDD
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40 Answers
40
Active
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phpunit mock method multiple calls with different arguments
...elect * from users"
string(32) "Called back: select * from roles"
.
Time: 0 seconds, Memory: 4.25Mb
OK (1 test, 1 assertion)
Reproduce why two ->with() calls dont' work:
<?php
class DB {
public function Query($sSql) {
return "";
}
}
class fooTest extends PHPUnit_Fram...
YouTube iframe API: how do I control an iframe player that's already in the HTML?
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+50
Fiddle Links: Source code - Preview - Small version
Update: This small function will only execute code in a single direction. If you w...
What is the difference between a generative and a discriminative algorithm?
...simple example. Suppose you have the following data in the form (x,y):
(1,0), (1,0), (2,0), (2, 1)
p(x,y) is
y=0 y=1
-----------
x=1 | 1/2 0
x=2 | 1/4 1/4
p(y|x) is
y=0 y=1
-----------
x=1 | 1 0
x=2 | 1/2 1/2
If you take a few minutes to stare at those two...
Create a unique number with javascript time
...econd, and three digit millisecond. So it would look something like this: 20111104103912732 ... this would give enough certainty of a unique number for my purposes.
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ORA-12514 TNS:listener does not currently know of service requested in connect descriptor
...here?
– Brad Rippe
May 12 '16 at 14:00
1
this might not be the case when multiple clients/servers...
How do I pass the value (not the reference) of a JS variable to a function? [duplicate]
...the let or const keywords to create a block-scoped variable:
for (let i = 0; i < results.length; i++) {
let marker = results[i];
google.maps.event.addListener(marker, 'click', () => change_selection(i));
}
In older browsers, you need to create a separate scope that saves the variable ...