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What is copy-on-write?
...ft SQL Server 2005. Instant snapshots preserve a static view of a database by storing a pre-modification copy of data when underlaying data are updated. Instant snapshots are used for testing uses or moment-dependent reports and should not be used to replace backups.
...
How does a PreparedStatement avoid or prevent SQL injection?
... SQL injection is, that a user input is used as part of the SQL statement. By using prepared statements you can force the user input to be handled as the content of a parameter (and not as a part of the SQL command).
But if you don't use the user input as a parameter for your prepared statement but...
.keyCode vs. .which
....keyCode || 0;
...which handles the possibility that e.which might be 0 (by restoring that 0 at the end, using JavaScript's curiously-powerful || operator).
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rails simple_form - hidden field - create?
... "some value"
Shorter, DRYer and perhaps more obvious.
Of course with ruby 1.9 and the new hash format we can go 3 characters shorter with...
=f.hidden_field :title, value: "some value"
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CursorLoader usage without ContentProvider
...on data changes (as Loaders are supposed to do)
– emmby
Jun 21 '12 at 21:44
1
@Jadeye here you ha...
Compile error: “g++: error trying to exec 'cc1plus': execvp: No such file or directory”
...esult, you probably have multiple versions of gcc installed. You can check by using:
dpkg -l | grep gcc | awk '{print $2}'
Usually, /usr/bin/gcc will be sym-linked to /etc/alternatives/gcc which is again sym-linked to say /usr/bin/gcc-4.6 or /usr/bin/gcc-4.8 (In case you have gcc-4.6, gcc-4.8...
How to avoid “Permission denied” when using pip with virtualenv
... @sebastian_oe I think I love you
– Nobbynob Littlun
Mar 26 '14 at 23:45
5
How to c...
python dataframe pandas drop column using int
... in columns, so to do this you can rename column you want to delete column by new name. Or you can reassign DataFrame like this:
df = df.iloc[:, [j for j, c in enumerate(df.columns) if j != i]]
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Which is faster: while(1) or while(2)?
This was an interview question asked by a senior manager.
23 Answers
23
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Insert HTML with React Variable Statements (JSX)
...
By using '' you are making it to string. Use without inverted commas it will work fine.
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