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function parseCSS(str) { | |
function trim(str) { | |
return (str||'').replace(/^\s\s*/, '').replace(/\s\s*$/, ''); | |
} | |
var i, j, k, | |
split = '}', | |
cur_key = '', | |
cur_key_split, | |
css = str.replace(/\t*/g, '').replace(/\s{2}/, ' ').replace(/[\n|\r]/g, ' ').replace(/\/\*.*?\*\//g, '').split(split), |
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Q: i want to choose 4 people out of 4 couples. i want a group with at least 1 couple. | |
4 couples: | |
ab | |
cd | |
ef | |
gh | |
> > > selecting among the four couples is: | |
> > > (4 choose 1) = 4 |