大约有 40,000 项符合查询结果（耗时：0.0386秒） [XML]
jQuery get selected option value (not the text, but the attribute 'value')
...20: Corrected old answer
Use :selected psuedo selector on the selected options and then use the .val function to get the value of the option.
$('select[name=selector] option').filter(':selected').val()
Side note: Using filter is better then using :selected selector directly in the first query.
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Check if a path represents a file or a folder
... // Check if it's a regular file
See File Javadoc
Or you can use the NIO class Files and check things like this:
Path file = new File(path).toPath();
boolean exists = Files.exists(file); // Check if the file exists
boolean isDirectory = Files.isDirectory(file); // Check if it's ...
mongodb, replicates and error: { “$err” : “not master and slaveOk=false”, “code” : 13435 }
...e allowing reads from a secondary. This is to protect you and your applications from performing eventually consistent reads by accident. You can do this in the shell with:
rs.slaveOk()
After that you can query normally from secondaries.
A note about "eventual consistency": under normal circumst...
Split files using tar, gz, zip, or bzip2 [closed]
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You can use the split command with the -b option:
split -b 1024m file.tar.gz
It can be reassembled on a Windows machine using @Joshua's answer.
copy /b file1 + file2 + file3 + file4 filetogether
Edit: As @Charlie stated in the comment below, you might want to se...
Format numbers to strings in Python
...}:{seconds:02} {"pm" if hours > 12 else "am"}'
or the str.format function starting with 2.7:
"{:02}:{:02}:{:02} {}".format(hours, minutes, seconds, "pm" if hours > 12 else "am")
or the string formatting % operator for even older versions of Python, but see the note in the docs:
"%02d:%02...
Removing pip's cache?
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If using pip 6.0 or newer, try adding the --no-cache-dir option.
If using pip older than pip 6.0, upgrade it with pip install -U pip.
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Find the number of downloads for a particular app in apple appstore [closed]
...en bought and shut down.
appannie.com and similarweb.com are the best options now. Thanks @rinogo for the original suggestion!
Outdated answer:
Site is still buggy, but this is by far the best that I've found. Not sure if it's accurate, but at least they give you numbers that you can guess off o...
Dismiss keyboard by touching background of UITableView
...fault this will detect a "gesture" on a single tap so no further customization is required), specifying a target/action for when the gesture is fired, and then attaching the gesture recognizer object to your table view.
E.g. Perhaps in your viewDidLoad method:
UITapGestureRecognizer *gestureRecogn...
Does Java have a using statement?
Does Java have a using statement that can be used when opening a session in hibernate?
12 Answers
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Android file chooser [closed]
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private void showFileChooser() {
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("*/*");
intent.addCategory(Intent.CATEGORY_OPENABLE);
try {
startActivityForResult(
Intent.createChooser(intent, "Select a File to Upload"),
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