我正在尝试将多个参数传递给Julia |>中的内置管道运算符。
我想要一些像这样的东西：
join([randstring() for i in 1:100], " ")
但是，使用管道操作符，我收到错误：
[randstring() for i in 1:100] |> join(" ")
我很确定这是多次调度的一项功能，其中有一个自己的方法，delim方法中的join(strings, delim, [last])在delim=""方法被省略时被定义为[randstring() for i in 1:100] |> join(" ") |> replace("|", " ")
。
我是否理解正确？有工作吗？
对于什么是值得的，我对管道的大部分用途最终都会引起不止一个论点。例如：
function htmlToPDF() {
var file = []
file[0]="0BweO_SXcQGqgcEV3Mk9QYVRMczQ"
file[1]="0BweO_SXcQGqgVU93ZU56WkRkN3c"
file[2]="0BweO_SXcQGqgMkIxTlhKajk5MFk"
var url = "https://drive.google.com/uc?export=view&id="
var img = UrlFetchApp.fetch(url+file[0])
file[0] = img.getBlob().getContentType()+';base64,'+ Utilities.base64Encode(img.getBlob().getBytes())
var img = UrlFetchApp.fetch(url+file[1])
file[1] = img.getBlob().getContentType()+';base64,'+ Utilities.base64Encode(img.getBlob().getBytes())
var img = UrlFetchApp.fetch(url+file[2])
file[2] = img.getBlob().getContentType()+';base64,'+ Utilities.base64Encode(img.getBlob().getBytes())
var html = "<!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.0 Transitional//EN' 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd'> <html xmlns='http://www.w3.org/1999/xhtml'> <head> <meta http-equiv='Content-Type' content='text/html; charset=utf-8' /> <title>High Return Real Estate</title> <style> @charset 'utf-8'; /* CSS Document */ body,html{ font-family: 'Lato', sans-serif; background:#dfe7ea; margin-top: 0; margin-bottom:0; } .main_wrapper { width: 930px; margin: 0 auto; background: #fff; padding: 0 23px 0 23px; box-shadow: 1px 1px 8px -1px #bbbbbb; } .top_header { background: #dfe9e9; display: inline-block; width: 100%; margin-bottom: 6px; } .left_top { display: inline-block; width: 70%; padding: 26px 0 26px 50px; float: left; } p.contact_person.right_person { border-right: 0; padding-left: 25px; display: inline-block; } p.contact_person { width: 214px; display: inline-block; text-align: left; border-right: 1px solid #ccd4d3; } .left_top p span { font-size: 13px; color: #000; display: inline-block; width: 100%; margin-top: 2px; } .left_top p { font-size: 20px; font-weight: bold; color: #ea9a5a; margin: 0; } .right_top img { border-top: 7px solid #496bb3; border-bottom: 7px solid #496bb3; padding: 16px 5px 13px 4px; } .right_top { display: inline-block; position: absolute; background: #fff; } .galleryimage_main img { width: 100%; display: inline-block; } .property_address { } .property_address p { font-size: 15px; text-transform: uppercase; color: #fff; margin-bottom: 0; margin-top: 4px; } .common_box_style { padding: 20px; background: #496bb3; text-transform: uppercase; } .common_box_style h2 { margin-top: 2px; color: #54bb73; font-size: 20px; } .property_information { margin-left: 6px; } .property_information ul li p { font-size: 15px; color: #fff; text-transform: capitalize; margin-bottom: 3px; margin-top: 0; } .property_information ul li { list-style: none; margin-bottom: 5px; } .property_information ul li span { font-size: 15px; color: #fff; text-transform: capitalize; margin-bottom: 3px; margin-top: 0; width: 100px; display: inline-block; text-align: left; } .property_information ul { padding-left: 0; width: auto; display: inline-block; float: left; margin-right: 15px; margin-top: 0; margin-bottom: 4px; } .property_information ul li span.value_field { font-size: 13px; } ul.grpleft li span { width: 136px; } p.cash_prize { text-align: center; font-size: 18px; font-weight: bold; color: #fff; display: inline-block; width: 100%; margin: 0; } p.cash_prize span { padding-left: 10px; } .margintop{ margin-top: 6px; } .left_col { width: 34%; float: left; } .right_col { display: inline-block; width: 66%; } .gallery_small_images { display: inline-block; width: 99%; margin-left: 6px; margin-top: 6px; height: 232px; overflow: hidden; } .gallery_small_images img{ width:100%; } .gallery_small_image2 { width: 50%; float: left; } .gallery_small_image3 { width: 49%; display: inline-block; float: left; margin-left: 6px; } table.expense_info tr td.exp_info_disc { font-size: 14px; color: #fff; text-transform: capitalize; text-align: left; } tr.total_exp td { padding-top: 13px; padding-bottom: 30px; } .cashflow h2 { margin-bottom: 7px; } .roi input[type='text'] { font-size: 23px; text-align: center; font-weight: bold; height: 33px; margin-bottom: 5px; } .roi h2 { margin-top: 24px; font-size: 22px; font-weight: 800; } tr.total_exp { font-weight: bold; margin-top: 4px; /* display: table; */ width: 100%; } table.expense_info th { font-size: 12px; font-weight: bold; color: #fff; text-transform: capitalize; } td { font-size: 13px; color: #fff; text-align: center; vertical-align: middle; } .expense_info.common_box_style.margintop { padding: 20px 13px; } table.cashflow { text-align: center; margin: 0 auto; color: #fff; text-transform: capitalize; } table.cashflow tr th { font-size: 19px; font-weight: normal; } table.cashflow tr td { font-size: 17px; font-weight: bold; } .roi { display: inline-block; background: #2bb673; width: 99%; text-align: center; color: #000; padding: 10px 0px 20px 0; margin-left: 6px; margin-top: 6px; } .discliamer_sec { background: #dfe9e9; display: inline-block; text-align: center; font-size: 9px; width: 100%; padding: 10px 0; line-height: 18px; margin-top: 6px; } .discliamer_sec h2 { color: #768293; } .footer_cright { background: #496bb3; text-align: center; font-size: 8px; color: #fff; padding: 1px 0; font-weight: 400; margin-top: 7px; display: inline-block; width: 100%; } @media print { .common_box_style, .roi, .discliamer_sec, .footer_cright, .top_header { background: !important; -webkit-print-color-adjust: exact; } } </style> <link href='https://fonts.googleapis.com/css?family=Lato:400,700' rel='stylesheet'> </head> <body> <div class='main_wrapper'> <div class='top_header'> <div class='left_top'><p class='contact_person'>Xyz xyz<span>xyz@xyz.com</span></p><p class='contact_person right_person'>Xyz xyz<span>xyz@xyz.com</span></p></div> <div class='right_top'>";
html +="<img src='images/logo.png' /></div> </div> <div class='galleryimage_main'> <img src='data:"+file[0]+"' alt='Gallery Image Here' height='350' width='885'/> </div> <div class='left_col'> <div class='property_address common_box_style margintop'> <h2>PROPERTY ADDRESS</h2> <p id='address_line_1' class='address_line_1'>4043 N RAVENSWOOD AVE,</p> <p id='address_line_2' class='address_line_2'>CSUITE 316, HICAGO,</p> </div> <div class='expense_info common_box_style margintop'> <h2>EXPENSE INFORMATION</h2> <table id='expense_information' class='expense_info' cellpadding='3' cellspacing='1'> <tr> <th></th> <th>%of Rent</th> <th>Monthly</th> <th>Yearly</th> </tr> <tr> <td class='exp_info_disc'>Estimated Taxes:</td> <td>-</td> <td>345</td> <td>777</td> </tr> <td class='exp_info_disc'>Estimated Insurance:</td> <td>-</td> <td>200</td> <td>133</td> </tr> <tr> <td class='exp_info_disc'>Management Fee:</td> <td>4</td> <td>344</td> <td>5200</td> </tr> <tr> <td class='exp_info_disc'>Vacancy Adjustment:</td> <td>2</td> <td>555</td> <td>50</td> </tr> <tr> <td class='exp_info_disc'>Repairs & Maintenance: </td> <td>10</td> <td>500</td> <td>50</td> </tr> <tr> </tr> <tr> </tr> <tr> </tr> <tr is='total_exp' class='total_exp'> <td class='exp_info_disc'>TOTAL EXPENSES:</td> <td></td> <td>343</td> <td>342</td> </tr> <tr> </tr><tr> </tr><tr> </tr> </table> </div> <div class='cashflow common_box_style margintop'> <h2>CASH FLOW ESTIMATE</h2> <table id='cashflow' class='cashflow' cellpadding='3' cellspacing='5'> <tr> <th>Per Month</th> <th>Per Year</th> </tr> <tr> <td>123</td> <td>4533</td> </tr> </table> </div> </div> <div class='right_col'> <div id='property_information' class='property_information common_box_style margintop'> <h2>PROPERTY Information</h2> <ul> <li><span>List Price:</span><span class='value_field'>100</span></p></li> <li><span>Rehab Costs:</span><span class='value_field'>100</span></p></li> <li><span>Structure:</span><span class='value_field'>Single Family</span></li> <li><span>Current Rent:</span><span class='value_field'>29</span></li> </ul> <ul class='grpleft'> <li><span>Bedrooms:</span><span class='value_field'>100</span></li> <li><span>Bathrooms:</span><span class='value_field'>100</span></p></li> <li><span>Square Footage:</span><span class='value_field'>100</span></p></li> <li><span> Current Status:</span><span class='value_field'>Rented and Performing </span></li> </ul> <p class='cash_prize'>CASH PRICE<span>300</span></p> </div> <div class='gallery_small_images'> <div class='gallery_small_image2'> <img src='data:"+file[1]+"' /> </div> <div class='gallery_small_image3'> <img src='data:"+file[2]+"' /> </div></div> <div class='roi' id='cash_on_cash'> <h2>CASH-ON-CASH ROI</h2> <input type='text' value='1200' id='cash_roi_input'></input> </div> </div> <div class='discliamer_sec'> <h2>Information deemed reliabale but not guranteed. Images not to scale. Buyer responsible for <br>due diligence for all information provided and should conduct their own research.</h2> </div> <div class='footer_cright'> <h2>Copyright © High Return Real Estate LLC - 2017</h2> </div> </div> </body> </html>";
var blob = HtmlService.createHtmlOutput(html);
//Utilities.newBlob(html, "text/html", "text.html");
blob = blob.getBlob();
var pdf = blob.getAs("application/pdf");
DriveApp.createFile(pdf).setName("text.pdf");
}
答案 0 :(得分：7)
管道操作员没有做任何神奇的事情。它只需要在左侧取值并将它们应用于右侧的函数。如您所见，join(" ")不会返回函数。一般来说，Julia中函数的部分应用不返回函数 - 它或者意味着不同的东西（通过多次调度）或者它将是一个错误。
有一些选项可以让您支持：
明确创建匿名函数：
[randstring() for i in 1:100] |> x->join(x, " ") |> x->replace(x, "|", " ")
使用宏来启用您正在寻找的特殊魔法。有一些软件包可以支持这种事情。
答案 1 :(得分：1)