Show pageDiscussionOld revisionsBacklinksBack to top This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong. ==== IFT ==== ---- <callout type="primary" color="" icon="fa fa-book" title="Synopsis"> ---- Execute objects on the stack conditionally </callout> <callout color="green" icon="fa fa-indent" title="Stack Diagram"> ---- ^ __Input Stack__ ^^ ^ __Output Stack__ ^ | **1** | **O** | **→** | **[O]<sub>XEQ</sub>** | | **0** | **O** | **→** | | | //Level 2// | //Level 1// | //→// | //Level 1// | {{page>manual:chapter6:aux:legend&nofooter&noeditbtn&inline}} |**Type**| [[manual:chapter5:basics#commands|Command]] || |**Parallel list processing**| [[manual:chapter5:listproc#group-2commands-that-must-use-dolist-to-parallel-process|Group 2]] || |**Affected by flags**| None || </callout> <callout color="orangered" icon="fa fa-comment" title="Description"> ---- The ''IFT'' command tests the object on level 2 of the stack: if the test returns ''1'' then it ''[[manual:chapter6:operators:cmd_ovr_xeq|XEQ]]''tes the object on level 1, otherwise both the object and the result of the test are dropped. </callout> <callout type="success" icon="true" title="Compatibility"> ---- This command is fully compatible with userRPL. </callout> <callout type="info" icon="true" title="Usage"> ---- <code> 3: "This is a string" 2: { 'X' 'Y' 'Z' } 1: 1_m …………………………………………………………………………………… IFT </code> will result in <code> 2: "This is a string" 1: 1_m …………………………………………………………………………………… </code> ---- <code> 3: "This is a string" 2: 0 1: 1_m …………………………………………………………………………………… IFT </code> will result in <code> 1: "This is a string" …………………………………………………………………………………… </code> </callout> <callout color="darkgray" icon="fa fa-hand-o-right" title="Related Commands"> ---- {{page>manual:chapter6:stack&nofooter&noeditbtn&inline}} </callout> manual/chapter6/stack/cmd_ift.txt Last modified: 2019/11/17 14:15by jojo1973