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Ruby arrays: %w vs %W
... (no variable interpolation, fewer escape sequences), while %W quotes like double quotes "".
irb(main):001:0> foo="hello"
=> "hello"
irb(main):002:0> %W(foo bar baz #{foo})
=> ["foo", "bar", "baz", "hello"]
irb(main):003:0> %w(foo bar baz #{foo})
=> ["foo", "bar", "baz", "\#{foo}"...
What does PHP keyword 'var' do?
...tice is to use it only if you need to be compatible with PHP 4. Certainly don't do private var - that will break things real quick, as var is just a synonym for public in PHP 5.
– cincodenada
Sep 19 '12 at 23:31
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How to prevent buttons from submitting forms
... page, with Firefox the remove button submits the form, but the add button does not.
17 Answers
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Oracle: how to UPSERT (update or insert into a table?)
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The issue is that you have a window in between the insert and the update where another process could successfully fire a delete. I did however use this pattern on a table that never has deletes fired against it.
– chotchki
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PostgreSQL: Which Datatype should be used for Currency?
...ever use float or float like datatype to represent currency because if you do, people are going to be unhappy when the financial report's bottom line figure is incorrect by + or - a few dollars.
The money type is just left in for historical reasons as far as I can tell.
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How do I initialize the base (super) class?
...h super(), e.g.
class X(object):
def __init__(self, x):
pass
def doit(self, bar):
pass
class Y(X):
def __init__(self):
super(Y, self).__init__(123)
def doit(self, foo):
return super(Y, self).doit(foo)
Because python knows about old- and new-style classes, there are diff...
Insert picture into Excel cell [closed]
..."float" around my worksheet, but I need to put them into a cell. How can I do this?
6 Answers
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How do I fetch lines before/after the grep result in bash?
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Thanks I figured out I need to do like this echo "$test" rather than echo $test
– sriram
Sep 16 '12 at 9:37
30
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How to set Python's default version to 3.x on OS X?
I'm running Mountain Lion and the basic default Python version is 2.7. I downloaded Python 3.3 and want to set it as default.
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Does PHP have threading?
...via CLI, but that's a bit rudimentary. Depending on what you are trying to do and how complex it is, this may or may not be an option.
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