node.js,mongodb,indexing,elasticsearch,exact-match

If the data is exactly "k r puram" and you're searching for exactly "k r puram" - then you shouldn't use an analyser. When inserting data the default behaviour in Elasticsearch is to use the standard analyser. To disable this use "index": "not_analyzed" in the mapping for the appropriate field....

javascript,regex,string,regex-negation,exact-match

You need to add a negative lookahead at the start. ^(?!.*\bwww\.)https?:\/\/.* DEMO (?!.*\bwww\.) Negative lookahead asserts that the string we are going to match won't contain, www.. \b means word boundary which matches between a word character and a non-word character. Without \b, www. in your regex would match www....

math,numbers,scheme,r5rs,exact-match

Yes. To get the numerator and denominator of a rational number you have two procedures you can use: (numerator (/ 6 4)) ⇒ 3 (denominator (/ 6 4)) ⇒ 2 As it demonstrates the values returned are the lowest terms. The report specifies the denominator is always positive and the...

excel,excel-formula,worksheet-function,conditional-formatting,exact-match

It seems there is a 255 character limit to the Conditional Formatting, Highlight Cells Rules..., Duplicate Values... rule. To me plausible since consistent with the limit for characters in a formula in VBA. A simple way to check is to apply such a rule to both the column with your...