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Why do we need a fieldset tag?
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194
The most obvious, practical example is:
<fieldset>
<legend>Colour</legend&g...
How to remove an element from a list by index
...he index of the element you want to delete:
>>> a = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> del a[-1]
>>> a
[0, 1, 2, 3, 4, 5, 6, 7, 8]
Also supports slices:
>>> del a[2:4]
>>> a
[0, 1, 4, 5, 6, 7, 8, 9]
Here is the section from the tutorial.
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Completely uninstall PostgreSQL 9.0.4 from Mac OSX Lion?
...r differences. I'm running Lion and I'm trying to uninstall PostgreSQL 9.0.4. I've looked at the last question and the link that it referenced, but I did not find a file called "uninstall-postgresql" when I run this command:
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bash: Bad Substitution
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answered Dec 16 '13 at 16:44
Vanni TotaroVanni Totaro
3,86922 gold badges2424 silver badges3838 bronze badges
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What's better at freeing memory with PHP: unset() or $var = null
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VonCVonC
985k405405 gold badges33953395 silver badges39913991 bronze badges
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Disabled form inputs do not appear in the request
...age" value="100" disabled="disabled" />
FYI, per 17.12.1 in the HTML 4 spec:
Disabled controls do not receive focus.
Disabled controls are skipped in tabbing navigation.
Disabled controls cannot be successfully posted.
You can use readonly attribute in your case, by doing this you will be ...
What is the difference between static_cast and C style casting?
... really hard to search for c style casts.
Another big benefit is that the 4 different C++ style casts express the intent of the programmer more clearly.
When writing C++ I'd pretty much always use the C++ ones over the the C style.
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Error in plot.new() : figure margins too large, Scatter plot
...s you can first check par("mar") output. You should be getting:
[1] 5.1 4.1 4.1 2.1
To change that write:
par(mar=c(1,1,1,1))
This should rectify the error. Or else you can change the values accordingly.
Hope this works for you.
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Rails raw SQL example
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446
You can do this:
sql = "Select * from ... your sql query here"
records_array = ActiveRecord::...
Insert a line at specific line number with sed or awk
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243
sed -i '8i8 This is Line 8' FILE
inserts at line 8
8 This is Line 8
into file FILE
-i do...