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Failed to execute 'btoa' on 'Window': The string to be encoded contains characters outside of the La
...
If you have UTF8, use this (actually works with SVG source), like:
btoa(unescape(encodeURIComponent(str)))
example:
var imgsrc = 'data:image/svg+xml;base64,' + btoa(unescape(encodeURIComponent(markup)));
var img = new ...
Split comma-separated strings in a column into separate rows
...ged with r-faq). As of today, it has been answered three times offering 6 different approaches but is lacking a benchmark as guidance which of the approaches is the fastest1.
The benchmarked solutions include
Matthew Lundberg's base R approach but modified according to Rich Scriven's comment,
Ja...
What is the fastest method for selecting descendant elements in jQuery?
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Method 1 and method 2 are identical with the only difference is that method 1 needs to parse the scope passed and translate it to a call to $parent.find(".child").show();.
Method 4 and Method 5 both need to parse the selector and then just call: $('#parent').children().filt...
Best content type to serve JSONP?
I have a webservice that when called without specifying a callback will return a JSON string using application/json as the content type.
...
多图选择器使用指导 · App Inventor 2 中文网
...列表) {
已选 = 路径列表
图像_1.Picture = select(已选, 1)
if length(已选) >= 2 {
图像_2.Picture = select(已选, 2)
}
if length(已选) >= 3 {
图像_3.Picture = select(已选, 3)
}
if length(已选) > 3 {
标签_更多.Text = join("+", length(已选) - 3)
...
How do I loop through a list by twos? [duplicate]
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This will work very well, as long as the list isn't huge. If the list is huge, you're making a copy of it when you use the slicing syntax...
– Chinmay Kanchi
Jun 7 '10 at 14:29
...
Using the rJava package on Win7 64 bit with R
...A_HOME, so consider that. I have not revisited this issue recently to know if all the steps below are still necessary.)
Here is some quick advice on how to get up and running with R + rJava on Windows 7 64bit. There are several possibilities, but most have fatal flaws. Here is what worked for me:
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String Concatenation using '+' operator
...get it all done in one go.
EDIT: Note that the compiler can't do anything if you concatenate in a loop. For example, this code:
string x = "";
foreach (string y in strings)
{
x += y;
}
just ends up as equivalent to:
string x = "";
foreach (string y in strings)
{
x = string.Concat(x, y);...
How to wait until an element exists?
...ionObserver((mutations) => {
mutations.forEach((mutation) => {
if (!mutation.addedNodes) return
for (let i = 0; i < mutation.addedNodes.length; i++) {
// do things to your newly added nodes here
let node = mutation.addedNodes[i]
}
})
})
observer.observe(documen...
Running a cron job at 2:30 AM everyday
...are added into crontab using crontab -e. Once you are done, save and exit (if you are using vi, typing :x does it). The good think of using this tool is that if you write an invalid command you are likely to get a message prompt on the form:
$ crontab -e
crontab: installing new crontab
"/tmp/cronta...