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What does “Object reference not set to an instance of an object” mean? [duplicate]
...ss an object without instantiating it.. You might need to use the "new" keyword to instantiate it first i.e create an instance of it.
For eg:
public class MyClass
{
public int Id {get; set;}
}
MyClass myClass;
myClass.Id = 0; <----------- An error will be thrown here.. because myClass is n...
TSQL Pivot without aggregate function
...e query - then ALL columns in the table are used in the grouping. In other words, the PIVOT returns something but not what we expect. This is a concept covered in-depth for the 70-761 certification exam.
– Zorkolot
Jul 1 '19 at 17:57
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Google MAP API Uncaught TypeError: Cannot read property 'offsetWidth' of null
...ialize function and your HTML or this same error may be thrown.
In other words, make sure your IDs match up. ;)
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Put icon inside input element in a form
.... Then, in order to push the cursor over, it uses padding-left.
In other words, they have these two CSS rules:
background: url(images/comment-author.gif) no-repeat scroll 7px 7px;
padding-left:30px;
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Reduce left and right margins in matplotlib plot
...d not how much to change it by, they are where to set the margin. In other words, if you want to bring the right edge margin in by 10%, you should set right=0.9, not right=0.1 matplotlib.sourceforge.net/api/…
– drootang
Nov 18 '11 at 16:18
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Using multiple delimiters in awk
...eparators, with | : ex: awk -F 'this|that|[=/]' '......' (usefull to have words/strings separating things) (note that this keeps the spaces in the fiels between 2 separators. Adding also |[ \t]+ can be useful, but can make things tricky ... as there are often spaces before and after 'this', this w...
How to remove the left part of a string?
...nvolved, nor any need to specify both '5' and the string 'Path=', In other words I prefer this approach from a code maintenance point of view.
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How do I remove  from the beginning of a file?
...
Three words for you:
Byte Order Mark (BOM)
That's the representation for the UTF-8 BOM in ISO-8859-1. You have to tell your editor to not use BOMs or use a different editor to strip them out.
To automatize the BOM's removal you ...
What's the function like sum() but for multiplication? product()?
...r 3rd party) library would do. The more builtins you have, the more common words become off-limits as local variable names.
– ojrac
Oct 13 '15 at 19:56
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How do I get the full path of the current file's directory?
...tivePython. __file__ (note that it's two underscores on either side of the word) is a standard part of python. It's not available in C-based modules, for example, but it should always be available in a python script.
– Bryan Oakley
Apr 17 '14 at 21:32
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