我尝试通过按一个按钮将png图像从JavaScript传递到PHP页面。但是它返回了一个错误,声明"Request-URI太大“。下面是我的代码:
myJavaScript.js
var w = window.open();
var dom = w.document;
var a = canvas[0].toDataURL("image/png");
dom.write('< input type="button
在试图通过pip安装JupyterLab的包依赖项时,我面临以下错误。
Installing collected packages: jedi, ipython, ipykernel, notebook, jupyterlab-server, jupyterlab
ERROR: Could not install packages due to an EnvironmentError: [Errno 2] No such file or directory: 'C:\\Users\\<Username>\\AppData\\Local\\Packages\\Python
下面的查询被截断,'created‘只显示’cre‘(滚动到最右边的first:):
mysql> SELECT GROUP_CONCAT(CONCAT('<comment><body><![CDATA[',body,']]></body>','<replier>',if(uid is not null,uid,''),'</replier>','<created>',created,'&l
为了使用ajax div启用返回函数,我创建了这些简单的函数,我想知道一个.js全局变量可以容纳多少数据??
var dataAfterSearch; //global variable which holds our search results
function goBackAfterSearch() {
/**
* function which displays the previous state
*
**/
$.ajaxSetup ({
cache: false
});
//alert("P
我有这样的疑问:
$sql = "select qu.id as qu_id, qu.question_id as qu_question_id, qu.question_time as qu_question_time, qu.time as qu_time, qu.useruid as q_useruid, qu.originuid as qu_originuid, concat(concat(' ', GROUP_CONCAT(follow.followeruid SEPARATOR ' ')), ' ') as f_fol
我正在尝试重新分配嵌套的for循环中的变量。我想获取列表列表中数字6的索引,但它不起作用。为什么它不工作,我如何修复它? 代码如下: row = 0
col = 0
a = [[1, 2, 3, 4, 5], [3, 4, 4, 6, 9]]
for i in range(len(a)):
for j in range(len(a)):
if a[i][j] == 6:
row = i # expect row = 1
col = j # expect col = 3
print(row) # prints 0
print(col) # prints 0
有谁能帮帮我吗?
我有以下数据集:
data have;
id name country
100 abc ind
为了理解清楚,第四栏是评论,我在下面添加
comments:
"SWIFTT LIST BRUPI
ACTION REQUIRED: REASSESS ASUP TO PICKUP INCM
Refer to note dated 21/07/2016 entered by TDEMP003.
ACTION TAKEN: I have reassessed Asupp based on the income from 25/
一旦达到给定数量的单词或字符(不包括空格),我正试图限制表单字段中文本框的长度。
我遇到的问题是,一旦达到上限,我就不知道如何限制子字符串最大长度变量。
我使用Callable.js ()作为计数器脚本。
var wordL = 3;
var charL = 18;
var boxid = 'descr';
var area = document.getElementById(boxid);
function fixlength(boxid,wordlimit,charlimit,wordcount,charcount,allcount) {
我有下面显示的AppleScript代码,它告诉iTunes从所选内容转换曲目。我想知道我将如何限制将要转换的曲目的长度?
tell application "iTunes"
set theFiles to the selection
repeat with theTrack in theFiles
with timeout of 120 seconds
set theSecondTrack to first item of (convert theTrack)
我在JavaScript中读了很多关于bind()和JavaScript的文章,特别是关于这个的创建简写部分。
我试图在JS中实现以下Python-esque函数:
var arr = [1,2,3];
len(arr); // 3
我确实意识到这是一个人为的例子,但我试图把我的头脑围绕这些方法。下面是我实现它的方法:
var len = Function.prototype.call.bind( Array.prototype.slice.length );
len([1,2,3]);
当我运行它时,我得到:
len([1,2,344])
^
TypeError: len is not a
我正尝试在Windows7上从运行框架-类型脚本-webpack,但在(成功)安装npm之后,npm start给我以下错误
module.js:327
throw err;
^
Error: Cannot find module 'core-js/library/fn/object/get-own-property-names'
at Function.Module._resolveFilename (module.js:325:15)
at Function.Module._load (module.js:276:25)
at Mo