Check if the node exists in the xsl

To check if the specific node exists in the tree or not in the xsl:

      <xsl:choose>
         <xsl:while test="path/to/node/to/check !=''">
             <xsl:value-of select = "path/to/node/to/check" />
         </xsl:while>
      </xsl:choose>

See how to handle encoding in XSL

See how you would solve these known algorithm problems

Find the first occurence of number in the sorted array

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Find the pairs that makes K Complementary in the given array java solution

Find K Complementary numbers from array Java implementation