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Change SQLite default settings
we know when type .mode column let m>me m> see tables like column
And .headers on , we can see the header of tables.
But I want to know if there is any way make the two default settings?
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What is a Context Free Grammar?
Can som>me m>one explain to m>me m> what a context free grammar is? After looking at the Wikipedia entry and then the Wikipedia entry on formal grammar, I am left utterly and totally befuddled. Would som>me m>one be so kind as to explain what these things are?
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Create a custom event in Java
I want to do som>me m>thing like this in Java but I don't know the way:
4 Answers
4
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How to remove debugging from an Express app?
...cket.io and connect-redis , but I do not know where the debugging mode com>me m>s from.
2 Answers
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RegEx: Smallest possible match or nongreedy match
... section (?:blah)? but without matching unless absolutely necessary, use som>me m>thing like (?:blah){0,1}?. For a repeating match (either using {n,} or {n,m} syntax) append a question mark to try to match as few as possible (e.g. {3,}? or {5,7}?).
The docum>me m>ntation on regular expression quantifiers may...
How do you write a migration to renam>me m> an ActiveRecord model and its table in Rails?
I'm terrible at naming and realize that there are a better set of nam>me m>s for my models in my Rails app. Is there any way to use a migration to renam>me m> a model and its corresponding table?
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How to strip all whitespace from string
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Taking advantage of str.split's behavior with no sep param>me m>ter:
>>> s = " \t foo \n bar "
>>> "".join(s.split())
'foobar'
If you just want to remove spaces instead of all whitespace:
>>> s.replace(" ", "")
'\tfoo\nbar'
Premature optimization
Even t...
Retargeting solution from .Net 4.0 to 4.5 - how to retarget the NuGet packages?
... your applications very well. In order to change your packages' target fram>me m>works, you must uninstall and reinstall the packages (taking note of the packages you had installed so that you can reinstall each of them).
The reason packages must be uninstalled and reinstalled is:
When installing a p...
Best way to m>me m>rge two maps and sum the values of sam>me m> key?
I want to m>me m>rge them, and sum the values of sam>me m> keys. So the result will be:
15 Answers
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How to base64 encode image in linux bash / shell
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You need to use cat to get the contents of the file nam>me m>d 'DSC_0251.JPG', rather than the filenam>me m> itself.
test="$(cat DSC_0251.JPG | base64)"
However, base64 can read from the file itself:
test=$( base64 DSC_0251.JPG )
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