大约有 21,000 项符合查询结果（耗时：0.0284秒） [XML]
Determine the number of NA values in a column
... In counting amount of arbitrary value, other than NA is writing a boolean function is.value and then using sum(is.value(df$col)) the way to go or is there a more concise direct syntax for this?
– user3274289
Jun 4 '14 at 2:11
...
Getting the first index of an object
...
Just for fun this works in JS 1.8.5
var obj = {a: 1, b: 2, c: 3};
Object.keys(obj)[0]; // "a"
This matches the same order that you would see doing
for (o in obj) { ... }
...
Ant task to run an Ant target only if a file exists?
...
I think its worth referencing this similar answer: https://stackoverflow.com/a/5288804/64313
Here is a another quick solution. There are other variations possible on this using the <available> tag:
# exit with failure if no files are found
<property name="file" val...
How do I extract text that lies between parentheses (round brackets)?
...e (sales)", @"\(([^)]*)\)").Groups[1].Value
As a response to the (very funny) comment, here's the same Regex with some explanation:
\( # Escaped parenthesis, means "starts with a '(' character"
( # Parentheses in a regex mean "put (capture) the stuff
# ...
rsync exclude according to .gitignore & .hgignore & svn:ignore like --filter=:C
... to build the list of files excluded by the repository's .gitignore files.
https://git-scm.com/docs/git-ls-files
Options:
--exclude-standard Consider all .gitignore files.
-o Don't ignore unstaged changes.
-i Only output ignored files.
--directory Only output the directory path if the entire dire...
How to check whether a file is empty or not?
...size() and stat() will throw an exception if the file does not exist. This function will return True/False without throwing (simpler but less robust):
import os
def is_non_zero_file(fpath):
return os.path.isfile(fpath) and os.path.getsize(fpath) > 0
...
How can I simulate an anchor click via jquery?
...;
works fine in chrome, firefox, opera and IE10.you can download it from https://github.com/eduardolundgren/jquery-simulate/blob/master/jquery.simulate.js
share
|
improve this answer
|
...
fatal: Not a valid object name: 'master'
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
jQuery - Detect value change on hidden input field
...ion() {
return _value;
}
}
});
}
$("#hid1").val(4);
https://jsfiddle.net/bvvmhvfk/
share
|
improve this answer
|
follow
|
...
Working Soap client example
...@gmail.com</example:email>
<example:LicenseKey>123</example:LicenseKey>
</example:VerifyEmail>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
*/
// SOAP Body
SOAPBody soapBody = envelope.getBody();
SOAPElement soapB...