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How to set radio button checked as default in radiogroup?
...do that without ids of your buttons, but please not by using setChecked() One way would be radiogroup.check(((RadioButton)radioGroup.getChildAt(INDEX)).getId()) or something like that
– Sprigg
Apr 29 '13 at 13:05
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How to delete or add column in SQLITE?
...d or remove constraints from a table.
You can:
create new table as the one you are trying to change,
copy all data,
drop old table,
rename the new one.
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NPM modules won't install globally without sudo
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One small detail to add is that you have to make the ~/npm directory yourself. Else, npm will exit with a ENOENT errors.
– Jason Farnsworth
Oct 3 '14 at 21:56
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Optimizing away a “while(1);” in C++0x
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Does someone have a good explanation of why this was necessary to allow?
Yes, Hans Boehm provides a rationale for this in N1528: Why undefined behavior for infinite loops?, although this is WG14 document the rationale applies to C++...
Omitting the second expression when using the if-else shorthand
...worried about file size, just create a minified version of it with help of one of the many JS compressors. (e.g Google's Closure Compiler)
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Makefiles with source files in different directories
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If you have code in one subdirectory dependent on code in another subdirectory, you are probably better off with a single makefile at top-level.
See Recursive Make Considered Harmful for the full rationale, but basically you want make to have t...
Why functional languages? [closed]
...t of talk on here about functional languages and stuff. Why would you use one over a "traditional" language? What do they do better? What are they worse at? What's the ideal functional programming application?
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Remove Object from Array using JavaScript
...(someArray.slice(-x));
Reply to the comment of @chill182: you can remove one or more elements from an array using Array.filter, or Array.splice combined with Array.findIndex (see MDN), e.g.
// non destructive filter > noJohn = John removed, but someArray will not change
let someArray = ge...
How to keep environment variables when using sudo
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This did not work with the simpler case of adding one element to the PATH in the .bashrc file -- say, export PATH=myPath:$PATH. If I type sudo -E bash -c 'echo $PATH', then PATH does not contain myPath probably because sudo has already disabled the local value of PATH before...
Can Flask have optional URL parameters?
...er way is to write
@user.route('/<user_id>', defaults={'username': None})
@user.route('/<user_id>/<username>')
def show(user_id, username):
pass
But I guess that you want to write a single route and mark username as optional? If that's the case, I don't think it's possible....