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How do I modify a MySQL column to allow NULL?
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You want the following:
ALTER TABLE mytable MODIFY mycolumn VARCHAR(255);
Columns are nullable by default. As long as the column is not declared UNIQUE or NOT NULL, there shouldn't be any problems.
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Press alt + numeric in bash and you get (arg [numeric]) what is that?
... as a repeat count, other times it is the sign of the argument that is significant. If you pass a negative argument to a command which normally acts in a forward direction, that command will act in a backward direction. For example, to kill text back to the start of the line, you might type 'M-- C-k...
Select values from XML field in SQL Server 2008
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You must use .nodes() and cross apply if xmlField contains more than one <person> elements.
– Remus Rusanu
May 22 '09 at 18:45
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How to force a view refresh without having it trigger automatically from an observable?
...an individual observable you can call myObservable.valueHasMutated() to notify subscribers that they should re-evaluate. This is generally not necessary in KO, as you mentioned.
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Rearranging Tab Bar Controller Order in StoryBoard
...n my app iPhone app I have a Tab Bar Controller with 4 relationships to 4 different Table View Controllers. Is there a way to rearrange the order of the relationship in the StoryBoard graphically? I can't find a way to do this and I'm sure I must be missing something!
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Socket.io rooms difference between broadcast.to and sockets.in
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in what way a channel is different than a room?
– vsync
Jun 11 '13 at 12:22
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In Maven 2, how do I know from which dependency comes a transitive dependency?
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If you use eclipse and the m2eclipse plugin then there is a graphical version of dependency tree where you can filter by scope etc.
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Strip Leading and Trailing Spaces From Java String
...t for Java 11's String.strip(). I haven't had time to explore the subtle differences.
– Josiah Yoder
May 14 at 12:53
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How to upper case every first letter of word in a string? [duplicate]
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i dont know if there is a function but this would do the job in case there is no exsiting one:
String s = "here are a bunch of words";
final StringBuilder result = new StringBuilder(s.length());
String[] words = s.split("\\s");
for(int...
How to empty a redis database?
... (and add some fun with it) during the last fews days and I'd like to know if there is a way to empty the db (remove the sets, the existing key....) easily.
During my tests, I created several sets with a lot of members, even created sets that I do not remember the name (how can I list those guys t...