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How can I determine if a JavaScript variable is defined in a page? [duplicate]
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162
I got it to work using if (typeof(x) != "undefined")
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lexers vs parsers
...l 3).
Grammar understood by parsers: context-free grammar (Chomsky's level 2).
They attach semantics (meaning) to the language pieces they find.
Lexers attach meaning by classifying lexemes (strings of symbols from the input) as the particular tokens. E.g. All these lexemes: *, ==, <=, ^ will ...
SQL Server 2008: how do I grant privileges to a username?
...DATE ON dbo.YourTable TO YourUserName
GRANT SELECT, INSERT ON dbo.YourTable2 TO YourUserName
GRANT SELECT, DELETE ON dbo.YourTable3 TO YourUserName
and so forth - you can granularly give SELECT, INSERT, UPDATE, DELETE permission on specific tables.
This is all very well documented in the MSDN Boo...
Storing Images in PostgreSQL
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Updating to 2012, when we see that image sizes, and number of images, are growing and growing, in all applications...
We need some distinction between "original image" and "processed image", like thumbnail.
As Jcoby's answer says, there ...
system(“pause”); - Why is it wrong?
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ravuyaravuya
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How can I escape double quotes in XML attributes values?
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You can use &quot;
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Delete multiple objects in django
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You can delete any QuerySet you'd like. For example, to delete all blog posts with some Post m...
How to see indexes for a database or table in MySQL?
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edited Mar 6 '11 at 21:11
answered Mar 6 '11 at 20:59
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Reordering of commits
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129
The command you're looking for is git rebase, specifically the -i/--interactive option.
I'm go...
Find a Pull Request on Github where a commit was originally created
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You can just go to github and enter the SHA into the search bar, make sure you select the "Iss...