Bantuan:Sorting
Templat:How-to
Tables can be made Templat:Mlw via client-side JavaScript with class="sortable". This works in MediaWiki 1.9 and above, which is installed in all Wikimedia projects.
A sortable table is identified by the arrows in each of its header cells. Clicking them will cause the table rows to sort based on the selected column, in ascending order first, and subsequently toggling between ascending and descending order. Links and other wiki-markup are not possible in headers.
Note that all of the below is subject to change due to improvements in the script.
JavaScript sunting
The JavaScript code wikibits.js has on each site a copy at {{SERVER}}/skins-1.5/common/wikibits.js, on this site //ms.wikipedia.org/skins-1.5/common/wikibits.js. In addition a site may have a page MediaWiki:Common.js which adds and overrides some code.
Sort modes sunting
The sort modes (the data types, which, in addition to the choice "ascending" or "descending", determine the sorting order) are as follows; in the given order (as soon as there is a match, subsequent criteria are not applicable, e.g., 24-12-2007 is a date, not a number. For the criteria, tags (e.g. span, sup, sub) are ignored.
- date (see also below)
- criterion: the first non-blank element is of the form "dd-dd-dddd", "dd-dd-dd", or "dd aaa dddd"
- order: the string abcdefghij of length 10 is positioned as ghijdeab, the string abcdefghijk of length 8 as 19ghdeab if gh>=50 (string comparison) and 20ghdeab otherwise (i.e., the assumed format is DD-MM-YYYY or DD-MM-YY), and the string "dd aaa dddd" with aaa an abbreviated month name: chronologically
- "currency" (this mode can be useful for other data also)
- criterion: the first non-blank element starts with $, £, €, or ¥
- order: numeric, ignoring these symbols and all ordinary letters and commas, but not spaces; note that scientific notation cannot be used, as e and E are removed
- numeric
- criterion: the first non-blank element consists of just digits, points, commas, spaces, "+", "-", possibly followed by "e" or "E" and a string consisting of "+", "-", digits
- order: if the string starts with a number (where spaces and nbsp's at the start are ignored) the order is numeric according to the first number in the string (parseFloat is applied) after removing the commas, if any; if it does not (parseFloat returns NaN), the element is positioned like 0
- proposed internationalisation: in German etc., treat comma as a decimal point
- string
- criterion: all other cases; to avoid one of the other modes, start e.g. with a hidden "&"; this can be done conveniently with m:Template:sms (backlinks, edit), which also allows more hidden text, as a sort key; while the similar templates above are called at the end of a table element, call this one at the start
- order: after conversion of capitals to lowercase the order is ASCII - partial list showing the order: !"#$%&'()*+,-./09:;<=>?@[\]^_'az{|}~é— (see also below; a blank space comes before every other character; an nbsp code counts as a space; two adjacent ordinary blank spaces count as one; for multiple blank spaces one can use nbsps or alternate nbsps and ordinary blank spaces)
The sort mode is determined by the table element that is currently in the first non-blank row below the header. In the case of different data types within one column (according to the criteria mentioned above) the sort mode may change after sorting, which can give a cycle of four or even more instead of two. This is confusing and gives undesired sorting orders, so that can better be avoided. However, it can be complicated to assess whether an element can ever be at the top after any sorting operations on the same and other columns, and this can also change after deleting a row, or adding a column. Therefore it is wise to make sure that every element matches the criterion for the required data type. Using a row template this can be done very conveniently.
An alternative method of making sure the sort mode of each column is as desired, is creating a first row that determines the sort modes, but in such a way that this row is not displayed and is excluded from sorting, see below.
Examples sunting
Text after a number (e.g. a footnote) does not affect the sorting order, if the sorting mode is numeric. However, if the number at the top has text after it, this makes the sorting mode alphabetic.
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The example with "a" gives alphabetic sorting; that with "e" ditto, the data are not mistaken for numbers in scientific format.
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The first example demonstrates that text is positioned at zero, and that e.g. e3 for 1000 is not allowed; use 1e3 instead. It also shows that "-" should be used, not "−".
The second example shows that expressions are not sorted according to their evaluated value, but according to the first number.
The third example shows that a percentage is accepted for numeric sorting mode, but ignored in the actual sorting, so if a column contains percentages, all numbers have to be written as a percentage.
The fourth example shows again that "ca. 12" sorts at 0, as opposed to 12 with some text after it, which sorts at 12. In case such an element arrives at the top of a column, it causes alphabetic sorting mode.
Additional features sunting
Excluding rows from sorting sunting
Sometimes it is helpful to exclude the last row of a table from the sorting process.
This can be achieved using class="sortbottom" on the desired table row (line starting with |-).
Wiki markup
{|class="wikitable sortable"
!Name!!Surname!!Height
|-
|John||Smith||1.85
|-
|Ron||Ray||1.89
|-
|Mario||Bianchi||1.72
|-class="sortbottom"
|||Average:||1.82
|}
What it looks like in your browser
| Name | Surname | Height |
|---|---|---|
| John | Smith | 1.85 |
| Ron | Ray | 1.89 |
| Mario | Bianchi | 1.72 |
| Average: | 1.82 |
More generally, one or more lines at the bottom marked with class="sortbottom" are sorted among themselves, but stay at the bottom. Thus it is not possible to keep multiple lines fixed at the bottom:
| Name | Surname | Height |
|---|---|---|
| John | Smith | 1.85 |
| Ron | Ray | 1.89 |
| Average: | 1.82 | |
| Name | Surname | Height |
The first row of a table can be made unsortable by marking every row other than the first with class="sortbottom". This first row can be a normal visible row to provide annotation for the headers.
Wiki markup
{|class="wikitable sortable"
!Name!!Surname!!Height
|-
|''(brief)''||''(from records)''||
|-class="sortbottom"
|John||Smith||1.85
|-class="sortbottom"
|Ron||Ray||1.89
|-class="sortbottom"
|Mario||Bianchi||1.72
|}
What it looks like in your browser
| Name | Surname | Height |
|---|---|---|
| (brief) | (from records) | |
| John | Smith | 1.85 |
| Ron | Ray | 1.89 |
| Mario | Bianchi | 1.72 |
The first unsortable row can also be a hidden row, with each element marked with <span style="display:none">...</span>, to ensure that each column has the desired sort mode. However, this technique creates tables that have accessibility issues, as it causes problems with screen readers and text browsers.
Making a column unsortable sunting
If you want a specific column not to be sortable, specify class="unsortable" in the attributes of its header cell.
Wiki markup
{|class="wikitable sortable"
!Numbers!!Alphabet!!Dates!!Currency!!class="unsortable"|Unsortable
|-
|1||Z||02-02-2004||5.00||This
|-
|2||y||13-apr-2005||||Column
|-
|3||X||17.aug.2006||6.50||Is
|-
|4||w||01.Jan.2005||4.20||Unsortable
|-
|5||V||05/12/2006||7.15||See?
|-class="sortbottom"
!Total: 15!!!!!!Total: 29.55!!
|-
|}
What it looks like in your browser
| Numbers | Alphabet | Dates | Currency | Unsortable |
|---|---|---|---|---|
| 1 | Z | 02-02-2004 | 5.00 | This |
| 2 | y | 13-apr-2005 | Column | |
| 3 | X | 17.aug.2006 | 6.50 | Is |
| 4 | w | 01.Jan.2005 | 4.20 | Unsortable |
| 5 | V | 05/12/2006 | 7.15 | See? |
| Total: 15 | Total: 29.55 | Original example |
Striping sunting
The JavaScript that makes tables sortable adds .odd and .even classes to the rows of the resulting table. If a cascading style sheet specifies that text be displayed differently in these two classes, alternating rows in the resulting table will appear differently. For example, including the following code in a style sheet causes every sortable table to have silver and gold background stripes:
tr.odd {
background-color: silver;
}
tr.even {
background-color: gold;
}
It is also possible to define an id in a CSS that causes only tables with that id to be striped, for example:
#stripe tr.odd {
background-color: silver;
}
#stripe tr.even {
background-color: gold;
}
In this case, only tables with class="sortable" and id="stripe" would display with alternating row colors.
If a user sorts the table according to a different column, the stripes still alternate. I.e., the stripes are specific to the positions of the rows in the sorted table, not to the positions of the rows in the wikitext.
You can apply sorting using a key which due to CSS is not displayed:
- <span style="display:none">...</span>
Example:
- p<span style="display:none">q</span>r displays pr[1]
Javascript sorting sorts the text inside and outside the tags, without the tags themselves. A hidden key can be put at the start. Both in the case of alphabetic and that of numeric sorting the first parts determine the order. Both parts together are used to determine the sort mode, so for numeric sorting the whole should be a valid number.
sunting
The key comes at the start and is separated from the displayed text in such a way that the latter does not affect the sorting order. For example, if there are no blank spaces in any key, then a blank space can be used for separation. If a single blank space is possible in a key, two nbsps can be used. For table elements for which the text to be displayed is equal to the key, no duplication is needed, of course.
If the text inside and outside the tags together is of a form that would cause a sorting mode other than alphabetic (if and when the element is at the top), a character can be appended at the end of the key to avoid this, again making sure it does not affect the sorting order by putting a space or two nbsps. This can be dispensed with if the element can never be at the top, but this can be complicated to assess as that can be caused by sorting other columns, with varying sorting modes, and it can change when deleting a row, adding a column, etc.
Instead of "display=none" another way is using a font color equal to the background, e.g. <font color="#f9f9f9">999</font> gives "999". With this method the hidden code can be seen in selected text (e.g. with the mouse). Also the hidden text is included when copying the rendered text. The first may be an advantage or a disadvantage, the second seems only a disadvantage. A complication is also that if a user uses a background color different from the default, the specified text color may not match it; to make sure they are the same the background color can be specified also.
sunting
If one needs to use alphabetic sort mode for numbers, one can construct a hidden alphabetic key for this purpose. This can be done for all numbers between -1e100 and 1e100 in arbitrary precision as follows:
- where scientific notation is used, it is normalized such that the absolute value of the mantissa is between 1 and 10; the exponent is put first
- scientific notation is used for all negative numbers, and all positive numbers outside some interval (below: 1e-9 to 1e9), and not inside that interval
- where the absolute value of the exponent and/or the mantissa is a decreasing function of the number, the notation uses its complement with respect to 99 for exponents and 10 for mantissas; the code "c" is added in these cases
- numbers 0 ≤ x < 1000 get a "+" in front
- positive numbers in scientific notation with a negative exponent get "+0" in front
- spaces inside the code and &-signs in front are added where needed:
- for numbers not in scientific notation the positions of all explicit and implicit decimal points are aligned
- for the starting position, i.e. the position of the first "-", "+", or "e", of other numbers, see the example table
- no code should satisfy the criterion for numeric sorting mode (below we have always either an ampersand or two letters e): although this matters only for the element at the top, any element might arrive at the top due to sorting another column
In the following the left column shows the code for alphabetic sorting, where cryptic followed by the regular notation. The second column contains the same (hence sorting the same), but with code hidden with CSS. The third column does not contain hidden parts and uses numeric sort mode. When sorting the first or second column "more than 1e9" is positioned suitably, while when sorting the third column it is positioned like 0. Moreover, if this cell would be at the top alphabetic sort mode would be used.
| full code for alphabetic sorting | display form | plain number |
|---|---|---|
| Templat:Lsc11amp | Templat:Lsc11amp | 6 |
| Templat:Lsc11amp | Templat:Lsc11amp | 7 |
| Templat:Lsc11amp | Templat:Lsc11amp | 1,048,576 |
| Templat:Lsc11amp | Templat:Lsc11amp | 1,234 |
| Templat:Lsc11amp | Templat:Lsc11amp | 123 |
| Templat:Lsc11amp | Templat:Lsc11amp | 16,777,216 |
| Templat:Lsc11amp | Templat:Lsc11amp | 65,536 |
| Templat:Lsc11amp | Templat:Lsc11amp | 67,108,864 |
| e23 6 6e23 | 6e23 | 6e23 |
| e09 1.01 more than 1e9 | more than 1e9 | more than 1e9 |
| e09 1 1e9 | 1e9 | 1e9 |
| &&&&&&&&&+0 ec89 9.999,99 9.999,99e-10 | Templat:Sms 9.999,99e-10 | 9.999,99e-10 |
| &&&&&&&&&+0.000,000,001 | 0.000,000,001 | 0.000,000,001 |
| &&&&&&&&&+0 ec87 6 6e-12 | 6e-12 | 6e-12 |
| &&&&&&&&&+0 ec86 7 7e-13 | 7e-13 | 7e-13 |
| &&&&&&&&&+0 ec87 5 5e-12 | 5e-12 | 5e-12 |
| &&&&&&&&&&-e-10 c0.000,01 -9.999,99e-10 | -9.999,99e-10 | -9.999,99e-10 |
| &&&&&&&&&&-e-08 c6.8 -3.2e-8 | -3.2e-8 | -3.2e-8 |
| &&&&&&&&&&&-ec86 c0.3 -9.7e13 | -9.7e13 | -9.7e13 |
| &&&&&&&&&&&-ec99 c7.7 -2.3 | -2.3 | -2.3 |
| Templat:Lsc11amp | Templat:Lsc11amp | 0 |
| Templat:Lsc11amp.3 | Templat:Lsc11amp.3 | 0.3 |
Padding sunting
Sometimes entries are padded on the left for alignment purposes. This can adversely affect how they are sorted.
Non-breaking spaces sunting
The effect of left-padding with " " codes, which render as blank spaces, depends on the browser: in IE they are (unlike actual blank spaces) counted for sorting as leading blank spaces, so in a list of numbers with text (for which the alphabetic sorting mode applies) they could be used to equalize the number of characters before the explicit or implicit decimal separator. However, in Firefox they are ignored for the purpose of sorting.
| Sorting using nbsps, works on IE but not on Firefox | Name |
|---|---|
| 100.3 FM | Third |
| 89.5 FM | First |
| 107.3 FM | Fourth |
| 95.3 FM | Second |
See also w:Talk:List_of_U.S._states_by_population#Sortable_Table.
Padding with zeros sunting
Example:
- 000156
Formatnum can be combined with padleft:
Integer:
{{formatnum:{{padleft:299792458|16|0}}}} gives:
- 0,000,000,299,792,458
Real:
{{formatnum:{{padleft:{{#expr:((299792458.056 - .5) round 0)}}|16|0}}}}.{{padleft:{{#expr:(1000000*(299792458.056 - ((299792458.056 - .5) round 0))) round 0}}|6|0}} gives:
- 0,000,000,299,792,458.056000
Dates sunting
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String sort mode (edit to view source)
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The sort mode is based on the rendered format; in the case of links: the labels, not the targets (though including any content hidden by "display:none").
Date sort mode:
One of the formats allowed for the date sort mode is produced by the Mediawiki's date-formatting feature in the right combination of preference and wikitext format: we need to use in the wikitext the format [[dd mmm]] [[yyyy]] (done in the example) and either no preference or preference dmy, or use with preference dmy one of the formats [[mmm dd]][[yyyy]], [[yyyy]][[mmm dd]], or [[yyyy]][[dd mmm]].
Incomplete dates:
- <span style="display:none">00 Jan </span>2007
- <span style="display:none">00</span> Mar 2007
String sort mode:
String sort mode provides chronological sorting for dates formated as <span style="display:none">&</span>YYYY-MM-DD; the hidden "&" avoids numeric sort mode.
Also we can hide the YYYY-MM-DD and put after that any choice of displayable text, including Mediawiki date formatting. The Wikipedia template Template:dts (pautan balik sunting) provides a convenient way of applying this method while using the date-formatting feature for display.
For years BC we can use, for example, !9937-09-23 for -0062-09-23 (subtract the year number BC from 10000, or the absolute value of the astronomical year from 9999).
If a table column contains any or all incomplete dates, this will not cause sorting problems. If only a year and month are given, that incomplete date is positioned alphabetically before the first day of the month in question. Likewise, if only a year is given, the date is positioned before the first month or day given for that year.
If at some point (i.e., after possible previous sorting) the form [[YYYY]] is at the top with a non-negative year, sorting would be numerical; in this case, after toggling between ascending and descending there would be no proper sorting within each year (because parsefloat is applied, finding the first number in the string, and basing sorting on only that number). Also, years BC would not be sorted properly. Therefore, alphabetic sorting has to be enforced. This can be done by putting a non-displayed character after the year, separated by a space.
See also:
Secondary key sunting
If a column contains a value multiple times then sorting the column preserves the order of the rows within each subset that has the same value in that column (Templat:Mlw). Thus sorting based on a primary, secondary, tertiary, etc. key can be done by sorting the least-significant key first, etc.
First click on column Alphabet and then on Numbers, you'll see that the ordering is on Numbers (1), Alphabet (2).
| Numbers | Alphabet | Dates | Currency | Text |
|---|---|---|---|---|
| 4 | a | 01.Jan.2005 | 4.20 | row 1 |
| 5 | a | 05/12/2006 | 7.15 | row 2 |
| 1 | b | 02-02-2004 | 5.00 | row 3 |
| 1 | a | 02-02-2004 | 5.00 | row 4 |
| 2 | x | 13-apr-2005 | row 5 | |
| 2 | a | 13-apr-2005 | row 6 | |
| 3 | a | 17.aug.2006 | 6.50 | row 7 |
| 3 | z | 25.aug.2006 | 2.30 | row 8 |
| 3 | z | 28.aug.2006 | 5.50 | row 9 |
| 3 | z | 31.aug.2006 | 3.77 | row 10 |
| 3 | z | 01.sep.2006 | 1.50 | row 11 |
| Bottom |
Keeping some rows together sunting
Partly hidden keys can be used to keep certain rows together. The original mutual order of these rows is preserved.
Example where this is the case for the rows about the Netherlands:
| Country/province | Capital |
|---|---|
| France | Paris |
| Netherlands | Amsterdam |
| South Holland | The Hague |
| U.K. | London |
Limitations sunting
Javascript sorting may not work properly on tables with cells extending over multiple rows and/or columns (however, sorting of columns up to and including the first with colspan does not seem to be affected). Also, while cells can be empty, they should not be missing at the end of a row. In these cases sometimes the table gets messed up when attempting to sort, while other times some of the sorting buttons work while others don't.
Colspan workaround sunting
To allow sorting, the formal number of cells in each row should be equal (if not all columns are made sortable this should apply at least for the number of cells up to and including the last sortable column). However, with a CSS hack the number of cells shown in a row can differ from the formal number of cells. For example, two formal cells can be shown as one by specifying a width for the first column, shifting the contents of the second cell to the left, increasing its width by the same amount, and hiding the cell border that would normally be visible. Hidden keys can be used to control, for sorting with respect to each column, how this row should be sorted.
Example:
| Country | Capital |
|---|---|
| France | Paris |
| U.K. | London |
This can be combined with the method of "keeping some rows together" demonstrated above. For an example of an application of this, consider a table of three columns where the third column would make the table too wide, such as a column of miscellaneous details. These details can be put in separate rows, each staying below the corresponding row when the table is sorted.
Example:
| Country | Capital |
|---|---|
| France | Paris |
| U.K. | London |
| Germany | Berlin |
A table row template makes this technique less cumbersome to apply, see e.g. w:List of furry conventions, w:Template:Furry-con-list-start and w:Template:Furry-con-list-entry.
Controlling sorting and display sunting
Text undesired for sorting but needed for display:
- In numeric sorting mode, this text (e.g. footnotes) needs to be put after the number; if at the top it causes string sort mode. See e.g. Help:Sorting/countries.
- In date sorting mode, this text needs to be put in a separate column; in the case of a cell containing a range of dates or numbers (e.g. from .. to ..), text in surplus of what is required for sorting is put in the extra column. If the first part of the text is used for sorting, then the extra column needs to be the following one; conversely, if the last part of the text is used for sorting, then the extra column needs to be the previous one; depending on the table format, this dividing of an item over two cells may look ugly.
- In alphabetic sorting, any footnotes etc. do not require a separate column; they can simply be put at the end of the element.
Text undesired for display but needed for sorting:
- can be put as hidden text in the column to be sorted
Combining the two, we can have displayed text independent of text used for sorting, by fully hiding the latter, and fully putting the former in a separate column (in date sorting mode and numeric sorting mode) or in the same column after the hidden text (in alphabetic sorting). Fully putting the displayed text in a separate column may look ugly if it is not done consistently for a whole column, but only for elements that require this (e.g. if most entries in a column are single numbers, but some are ranges).
Static column sunting
A static column, e.g. with row numbers, can be obtained with two side-by-side tables with for each row the same height set in both tables:
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The style can be adjusted to make it appear as a single table. If for some row the height of that row is too small for the text in a cell on one of the sides, the browser increases it, and there is no longer a match.
A static column can also be created by enclosing the sortable table with the templates {{static column begin}} and {{end}}. See the documentation of {{static column begin}} for details.
Sorting tables by default sunting
It is not possible to make a table appear sorted by a certain column without the user clicking on it. By default, the rows of a table always appear in the same order as in the wikitext. If you want a table to appear sorted by a certain column, you must sort the wikitext itself in that order; see the next section for one way to do this.
Sorting the wikitext of a table sunting
One way to sort the wikitext itself by a certain column is to use the following trick. You can make an auxiliary sortable table containing the wikitext for the original table, and sort it. You can then replace the original wikitext by this sorted wikitext.
Example:
Original table:
| demo |
|---|
| 9 |
| 12 |
| 11 |
Auxiliary table:
{|class="wikitable sortable"
!demo
| header |
|---|
| |- | 9 |
| |- |12 |
| |- |11 |
|}
Now you can sort the above table, and copy the rendered text to the edit box. After deleting the "header" line, this renders as a new defaultly sorted table:
| demo |
|---|
| 9 |
| 11 |
| 12 |
Alphabetic sorting order sunting
Sort the following table to see an example of the alphabetic sort order. Note that sorting is case-insensitive: the two-character entries such as A1 demonstrate that A and a are at the same position.
| demo |
|---|
| ! |
| " |
| # |
| $ |
| % |
| & |
| ' |
| ( |
| ) |
| * |
| + |
| , |
| - |
| . |
| / |
| 0 |
| 9 |
| : |
| ; |
| < |
| = |
| > |
| ? |
| @ |
| [ |
| \ |
| ] |
| ^ |
| _ |
| ' |
| A |
| Z |
| a |
| z |
| A1 |
| Z1 |
| a1 |
| z1 |
| { |
| | |
| } |
| ~ |
| — |
| É |
| é |
| É1 |
| é1 |
Browser issues sunting
With older versions of Safari a table can only be sorted by the first column: all sort buttons have the effect that only the leftmost one is supposed to have.
Notes sunting
- ^ For spam protection reasons on some projects a page with <span style="display:none"> cannot be saved.
See also sunting
- Sortable collapsible table
- Template:dts (pautan balik sunting) - sorting a table by a date column, while following w:Wikipedia:Manual_of_Style_(dates_and_numbers)#Dates_containing_a_month_and_a_day for display
- w:Category:Sorting templates
- m:Template:sd (backlinks, edit) - shows buggy date sorting when some or all dates are linked
- Help:Table
- wikibits.js - contains, among other things, the sorting code
- changes regarding sorting:
- Sep 2008: allow negative numbers and scientific notation in determining numeric sort mode
- Nov 2007 allow multiple commas in numbers - from [1]
- Feb 2007 allow pound and euro in currency sort mode
- Jan 2007 sorttable.js merged into wikibits.js
- for older revisions see the revision history of sorttable.js
- meta:MediaWiki:Common.js page overriding function ts_parseFloat(num) and function ts_resortTable(lnk) on Meta with improved versions
- page overriding function ts_parseFloat(num); adaptation to decimal comma
- changes regarding sorting:
- bugzilla:2001 - resolved feature request
- bugzilla:8063 - request to enable sorting of numbers with a point as thousands separator
- bugzilla:8115
- http://www.kryogenix.org/code/browser/sorttable/ - explanation of the original version of the code by Stuart Langridge; an improvement in the MediaWiki version is that tables no longer need to have an id.
- http://blog.webkist.com/archives/000043.html
- http://www.joostdevalk.nl/code/sortable-table/
- w:Wikipedia:Wikipedia Signpost/2007-01-02/Technology report
- Template:sort (pautan balik sunting)
- mw:Extension:Sort2
- mw:Extension:Sort
- w:User:TimR/Tables
Examples elsewhere:
- w:Ranked list of Dutch provinces
- w:List of countries by GDP estimates for 2006 (nominal)
- w:List of countries by GDP (PPP), 2006
- w:List of longest reigning current monarchs - date columns are sortable for people with "no preference" for date formatting, and for people with preference [[YYYY-MM-DD]].
- Pokémon table - prefixes numbers with "#" to have them before "-".
- Nuclear power by country (Featured List)
- w:Desert Island Discs: castaways' choices
- zh:秘鲁行政区划 (Subdivisions of Peru) for sorting of Chinese (CJK)
- w:Standard electrode potential (data page)