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Convert HH:MM:SS string to seconds only in javascript
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Try this:
var hms = '02:04:33'; // your input string
var a = hms.split(':'); // split it at the colons
// minutes are worth 60 seconds. Hours are worth 60 minutes.
var seconds = (+a[0]) * 60 * 60 + (+a[1]) * 60 + (+a[2]);
console.log(seconds...
Set a persistent environment variable from cmd.exe
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answered May 5 '11 at 13:09
Vik DavidVik David
3,00633 gold badges1919 silver badges2626 bronze badges
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How do you use String.substringWithRange? (or, how do Ranges work in Swift?)
...NSString = str as NSString
myNSString.substringWithRange(NSRange(location: 0, length: 3))
Note: as JanX2 mentioned, this second method is not safe with unicode strings.
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Gradient of n colors ranging from color 1 and color 2
...friend here:
colfunc <- colorRampPalette(c("black", "white"))
colfunc(10)
# [1] "#000000" "#1C1C1C" "#383838" "#555555" "#717171" "#8D8D8D" "#AAAAAA"
# [8] "#C6C6C6" "#E2E2E2" "#FFFFFF"
And just to show it works:
plot(rep(1,10),col=colfunc(10),pch=19,cex=3)
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Getting one value from a tuple
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207
You can write
i = 5 + tup()[0]
Tuples can be indexed just like lists.
The main difference b...
Eclipse, regular expression search and replace
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edited Jun 20 at 9:12
Community♦
111 silver badge
answered Sep 3 '09 at 11:04
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When do I need to use a semicolon vs a slash in Oracle SQL?
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answered Jul 3 '09 at 17:12
dpbradleydpbradley
11k2727 silver badges3232 bronze badges
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How do I empty an array in JavaScript?
...,'c','d','e','f']
Method 2 (as suggested by Matthew Crumley)
A.length = 0
This will clear the existing array by setting its length to 0. Some have argued that this may not work in all implementations of JavaScript, but it turns out that this is not the case. It also works when using "strict mod...
Maven in Eclipse: step by step installation [closed]
I have spent been on the Maven site reading the 5- and 30-minute tutorials, and trialing Maven out for the first time.
13 A...
Python argparse: default value or specified value
...example=1)
% test.py --example 2
Namespace(example=2)
nargs='?' means 0-or-1 arguments
const=1 sets the default when there are 0 arguments
type=int converts the argument to int
If you want test.py to set example to 1 even if no --example is specified, then include default=1. That is, with
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