Check-in [a90f7fe90e]

{"tip": {
	"523":{"url":"./tip/523.md","keywords":"queue, stack, pop","created":"22-Oct-2018","post-history":"","state":"Draft","tcl-branch":"tip-523","tcl-version":"8.7","vote":"Pending","type":"Project","title":"# TIP 523: New lpop command","author":["Peter Spjuth <[email protected]>"],"is-jest":false},
	"522":{"url":"./tip/522.md","keywords":"tcltest, error codes","created":"22-Oct-2018","post-history":"","state":"Draft","tcl-branch":"tip-522","tcl-version":"8.7","vote":"Pending","type":"Project","title":"# TIP 522: Test error codes with Tcltest","author":["Peter Spjuth <[email protected]>"],"is-jest":false},
	"521":{"url":"./tip/521.md","keywords":"Tcl, floating point, NaN, not a number","created":"21 October 2018","post-history":"","state":"Draft","tcl-version":"8.7","vote":"Pending","type":"Project","title":"# TIP 521: Floating Point Classification Functions","author":["Kevin B. Kenny <[email protected]>"],"is-jest":false},
	"520":{"url":"./tip/520.md","keywords":"Tcl, floating point, NaN, not a number","created":"18 October 2018","post-history":"","state":"Draft","tcl-version":"8.7","vote":"Pending","type":"Project","title":"# TIP 520: Make NaN Quiet","author":["Kevin B. Kenny <[email protected]>"],"is-jest":false},
	"519":{"url":"./tip/519.md","keywords":"TclOO","":"","state":"Draft","this tip proposes to extend the `method` subcommand of the `oo":":define` command","type":"Project","author":["Pietro Cerutti <[email protected]>"],"follows":"","oo":":define RPCClient {","created":"18-Oct-2018","title":"# TIP 519: Inline export/unexport option to TclOO method definition","the class definition in the previous example would then be as follows":"","post-history":"","vote":"Pending","tcl-version":"8.7","tcl-branch":"tip-519","is-jest":false},
	"518":{"url":"./tip/518.md","keywords":"Tk","created":"22-Sep-2018","post-history":"","state":"Draft","tk-branch":"tip518-event-last-child-unmanaged","tcl-version":"8.7","vote":"Done","type":"Project","title":"# TIP 518: Virtual Event when Last Child is not Managed any more","author":["Harald Oehlmann <[email protected]>"],"is-jest":false},
	"517":{"url":"./tip/517.md","keywords":"tk menu","created":"13-Sept-2018","post-history":"","state":"Final","tk-branch":"tip-517","tcl-version":"8.7","vote":"Done","type":"Project","title":"# TIP 517: Add -activerelief Configuration Option to the menu widget","author":["Francois Vogel <[email protected]>"],"is-jest":false},
	"516":{"url":"./tip/516.md","keywords":"Tcl, TclOO","state":"Final","type":"Project","author":["Donal K. Fellows <[email protected]>"],"vote-results":"4/0/5 accepted","votes-for":"DKF, JN, JD, AK","votes-against":"none","created":"7-Sept-2018","title":"# TIP 516: More OO Slot Operations","post-history":"","tcl-branch":"tip-516","vote":"Done","tcl-version":"8.7","votes-present":"BG, KBK, DGP, FV, SL","is-jest":false},

	"4":{"url":"./tip/4.md","created":"26-Oct-2000","post-history":"","state":"Draft","vote":"Pending","type":"Informative","title":"# TIP 4: Tcl Release and Distribution Philosophy","discussions-to":"news:comp.lang.tcl","author":["Brent Welch <[email protected]>","Donal K. Fellows <[email protected]>","Larry W. Virden <[email protected]>","Larry W. Virden <[email protected]>"],"is-jest":false},
	"3":{"url":"./tip/3.md","created":"14-Sep-2000","post-history":"","state":"Accepted","vote":"Done","type":"Process","title":"# TIP 3: TIP Format","author":["Andreas Kupries <[email protected]>","Donal K. Fellows <[email protected]>"],"is-jest":false},
	"2":{"url":"./tip/2.md","created":"12-Sep-2000","post-history":"","state":"Draft","vote":"Pending","type":"Process","title":"# TIP 2: TIP Guidelines","author":["Andreas Kupries <[email protected]>","Donal K. Fellows <[email protected]>","Don Porter <[email protected]>","Mo DeJong <[email protected]>","Larry W. Virden <[email protected]>","Kevin Kenny <[email protected]>"],"is-jest":false},
	"1":{"url":"./tip/1.md","created":"14-Sep-2000","post-history":"","state":"Active","vote":"No voting","type":"Informational","title":"# TIP 1: TIP Index","author":["TIP Editor <[email protected]>"],"is-jest":false},
	"0":{"url":"./tip/0.md","created":"11-Dec-2000","post-history":"","state":"Final","vote":"Done","type":"Process","title":"# TIP 0: Tcl Core Team Basic Rules","author":["John Ousterhout <[email protected]>"],"is-jest":false},
	"@min": 0,
	"@max": 523
}, "@timestamp": 1540233909}

<tr class='project projectdraft projectdraft87 project87'>
<td valign='top'><a href='./tip/523.md'>523</a></td>
<td valign='top'>Project</td>
<td valign='top'>8.7</td>
<td valign='top'>Draft</td>
<td valign='top'># TIP 523: New lpop command</td>
<td valign='top'><a href='/tcl/timeline?r=tip-523'>Link</a></td>
</tr>
<tr class='project projectdraft projectdraft87 project87'>
<td valign='top'><a href='./tip/522.md'>522</a></td>
<td valign='top'>Project</td>
<td valign='top'>8.7</td>
<td valign='top'>Draft</td>
<td valign='top'># TIP 522: Test error codes with Tcltest</td>

# TIP 523: New lpop command
	Author:		Peter Spjuth <[email protected]>
	State:		Draft
	Type:		Project
	Vote:		Pending
	Created:	22-Oct-2018
	Post-History:
	Tcl-Version:	8.7
	Tcl-Branch:	tip-523
	Keywords:	queue, stack, pop
-----

# Abstract

Add a command to efficiently remove an element from a list.