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How to check if field is null or empty in MySQL?
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194
Either use
SELECT IF(field1 IS NULL or field1 = '', 'empty', field1) as field1
from tablenam...
How can I make an svg scale with its parent container?
...lt;svg>
<polygon fill=red stroke-width=0
points="0,10 20,10 10,0" />
</svg>
It will render as a 10px by 20px triangle:
Now, if you set only the width and height, that will change the size of the SVG element, but not scale the triangle:
<svg width=100 height=...
overlay two images in android to set an imageview
...mage, or you can configure a LayerDrawable dynamically in code.
Solution #1 (via XML):
Create a new Drawable XML file, let's call it layer.xml:
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/t" />
<item android:draw...
python re.sub group: number after \number
How can I replace foobar with foo123bar ?
1 Answer
1
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Reading a string with scanf
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140
An array "decays" into a pointer to its first element, so scanf("%s", string) is equivalent to...
Select records from NOW() -1 Day
... in a MySQL statement to order records (through a date stamp) by >= NOW() -1 so all records from the day before today to the future are selected?
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Which, if any, C++ compilers do tail-recursion optimization?
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131
All current mainstream compilers perform tail call optimisation fairly well (and have done for...
Passing command line arguments in Visual Studio 2010?
... how to pass command line arguments to my main function in Visual Studio 2010 Express Edition. I want to debug - how do these command line arguments work?
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Matplotlib plots: removing axis, legends and white spaces
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