digitalmars.D.learn - How to remove element from an SList?
- Chris Pons (14/14) Mar 27 2012 Right now i'm struggling with trying to understand how to remove
- =?UTF-8?B?QWxpIMOHZWhyZWxp?= (18/30) Mar 27 2012 I don't have experience with std.container but I think you need to call
- bearophile (5/20) Mar 27 2012 That seems an example for the dlang site docs :-)
Right now i'm struggling with trying to understand how to remove an element from a n SList. I only want to remove one element, not a range of elements. I also don't want to use an Array because I will have to reshuffle elements to take care of the empty spot when I remove it. The only thing I've seen so far is find from std. algorithm and linearRemove. However I can't get find to work and I don't exactly believe linearRemove will work either because afaik that removes up to the index specified? I'm not to clear on this. Here's a simplified example of what I was trying: SList!int intList; intList.insert( 1 ); auto a = find( intList, 1 ); intList.linearRemove( a );
Mar 27 2012
On 03/27/2012 05:02 PM, Chris Pons wrote:Right now i'm struggling with trying to understand how to remove an element from a n SList. I only want to remove one element, not a range of elements.I don't have experience with std.container but I think you need to call take(a, 1).The only thing I've seen so far is find from std. algorithm and linearRemove. However I can't get find to work and I don't exactly believe linearRemove will work either because afaik that removes up to the index specified? I'm not to clear on this. Here's a simplified example of what I was trying: SList!int intList; intList.insert( 1 ); auto a = find( intList, 1 ); intList.linearRemove( a );The following worked for me. Note treating the SList as a range by []: import std.container; import std.stdio; import std.algorithm; import std.range; void main() { auto l = SList!int(1, 2, 3, 4, 5, 6, 7); auto a = find(l[], 2); // Search for 2 ... l.linearRemove(take(a, 1)); // ... and remove just 2 auto b = find(l[], 6); // Search for 6 ... l.linearRemove(b); // ... and remove from there assert(l == SList!int(1, 3, 4, 5)); } Ali
Mar 27 2012
Ali Çehreli:The following worked for me. Note treating the SList as a range by []: import std.container; import std.stdio; import std.algorithm; import std.range; void main() { auto l = SList!int(1, 2, 3, 4, 5, 6, 7); auto a = find(l[], 2); // Search for 2 ... l.linearRemove(take(a, 1)); // ... and remove just 2 auto b = find(l[], 6); // Search for 6 ... l.linearRemove(b); // ... and remove from there assert(l == SList!int(1, 3, 4, 5)); }That seems an example for the dlang site docs :-) (It just needs to show the usage of "cursors" to on the list?) Bye, bearophile
Mar 27 2012