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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 ...
Detecting Unsaved Changes
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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
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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
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x=1 | 1/2 0
x=2 | 1/4 1/4
p(y|x) is
y=0 y=1
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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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Build an iOS app without owning a mac? [closed]
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edited Nov 20 '15 at 12:27
answered Sep 11 '13 at 11:42
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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 ...
Count how many records are in a CSV Python?
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What is the correct MIME type to use for an RSS feed?
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edited Dec 24 '10 at 11:06
answered Feb 27 '09 at 16:58
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