closest | 易学教程

Select specific closest element

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问题 I have the following html : <table id="objects"> <tr> <td> <input type="text" value="2" /> </td> <td> <a href="#" class="delete">link</a> </td> </tr> <tr> <td> <input type="text" value="4" /> </td> <td> <a href="#" class="delete">link</a> </td> </tr> </table> When I click anchor tag I'd like to select <input> closest to my link, and get it's value. How can I do this ? I was trying : $('.delete').click(function(e){ e.preventDefault(); var val = $(this).closest('input').attr('value'); alert(val

Efficiently finding the closest coordinate pair from a set in Python

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问题 The Problem Imagine I am stood in an airport. Given a geographic coordinate pair, how can one efficiently determine which airport I am stood in? Inputs A coordinate pair (x,y) representing the location I am stood at. A set of coordinate pairs [(a1,b1), (a2,b2)...] where each coordinate pair represents one airport. Desired Output A coordinate pair (a,b) from the set of airport coordinate pairs representing the closest airport to the point (x,y) . Inefficient Solution Here is my inefficient

Efficiently finding the closest coordinate pair from a set in Python

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easyui datagrid

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http://www.jeasyuicn.com/sort/extend/ 1获取选择行 var rows = $('#tt').datagrid('getSelected'); 2获取所在行function getRowIndex(target) {$(target).closest('tr.datagrid-row'); return parseInt(tr.attr('datagrid-row-index'));} 3获取所有行 var row = $('#tt').datagrid(‘getRows’); 4修改某行$('#tt').datagrid('updateRow',{index:rowIndex,row: response.data.data}); 5行状态为可编辑$('#tt').datagrid('beginEdit', rowIndex); 6 获取修改行的修改值和原来值 var ed = $('#tt').datagrid('getEditors',rowIndex); var d0=jQuery(ed[0].target).val(); jQuery(ed[0].target).val(ed[0].oldHtml); 7 修改单元格值$(target).closest('div').html(s); 8 删除行$('#tt').datagrid(

R - Assign column value based on closest match in second data frame

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问题 I have two data frames, logger and df (times are numeric): logger <- data.frame( time = c(1280248354:1280248413), temp = runif(60,min=18,max=24.5) ) df <- data.frame( obs = c(1:10), time = runif(10,min=1280248354,max=1280248413), temp = NA ) I would like to search logger$time for the closest match to each row in df$time, and assign the associated logger$temp to df$temp. So far, I have been successful using the following loop: for (i in 1:length(df$time)){ closestto<-which.min(abs((logger$time

Using a class name in jQuery's .closest()

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问题 I'm attempting to do some calculations for a "running total", this is my code: $('.quantity_input').live('change',function(){ var ValOne = parseFloat($(this).val()); var ValTwo = parseFloat($(".price").text()) var totalTotal = ((ValOne) * (ValTwo)); $('.cost_of_items').closest('.cost_of_items').text(totalTotal.toFixed(2)); calcTotal(); }); .quantity_input is an input, .price is the price of the product, .cost_of_items is where i want to update the total cost for the item, ie. item1 = £5 x 3

Opposite to jQuery's .Closest (Top/Far-Most?)

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问题 I have a code with lots of submenus that share the same class name. Here's a structure: .menu .sub-menu .sub-menu .sub-menu .sub-menu .sub-menu .sub-menu .elem .elem .sub-menu Note that .sub-menu may be infinite levels deep. So how do I achieve this: when .elem is clicked, I want to travers the DOM upwards until the top-most .sub-menu is reached and apply a style to it. I am aware of .closest() and .parent() and .find() , but I have no idea if jQuery has such feature such as .topMost(selector

JavaScript Closest point from mouse

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问题 Before you comment, yes i have checked other questions aswell... like this article, or this one, or maybe even this one. However, i couldn't find how to set the point of origin. So, let's say i have an array picture X coords and picture Y coords (on a grid of 100*100) x /y 92/81 82/47 81/03 Now i have the mouseX and mouseY. Does anyone know how to make a function that gives you the closest point x and y values in JavaScript? Thanks in advance! 回答1: Just do some vecor math. Given the images

SQL Join tables on Time Between Start and End

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问题 I have two tables: Events (ID, Name, Time, Recorder) Video (ID, StartTime, EndTime, Recorder, Filename) I wish to join the Event data to the video data, so that for every event I get the video filename. The recorder field is used to specify which recorder was operable at the event's time, and assists with multiple recorders recording video at the same time. If i wasn't concerned about the events which have no video then this is fine (I can get the SQL), however in my case i wish to show the

DAX closest value match with no relationship

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问题 I'm trying to migrate a report from Excel into Power BI and I'm hoping someone can help me as I'm new to DAX. I have two tables and one (let's call it table A) contains a column of planned start Date/Times for events while the other contains the actual start Date/Times of the same events. There is usually only a few minutes difference between the planned and actual start times. I need to match the closest actual start Date/Time from Table B to the planned start Date/Times in table A. There