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How to read all files in a folder from Java?
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public void listFilesForFolder(final File folder) {
for (final File fileEntry : folder.listFiles()) {
if (fileEntry.isDirectory()) {
listFilesForFolder(fileEntry);
} else {
System.out.println(fileEntry.g...
How to get the instance id from within an ec2 instance?
...nstance-id || die \"wget instance-id has failed: $?\"`"
An example of a more advanced use (retrieve instance ID as well as availability zone and region, etc.):
EC2_INSTANCE_ID="`wget -q -O - http://169.254.169.254/latest/meta-data/instance-id || die \"wget instance-id has failed: $?\"`"
test -n "...
Android: What's the difference between Activity.runOnUiThread and View.post?
...st will post the runnable on the queue (e.g. call the Handler#post)
The important point IMO is that both have the same goal, and for whoever use it, there should be no difference (and the implementation may change in the future).
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Get an object's class name at runtime
...MyClass {}
const instance = new MyClass();
console.log(instance.constructor.name); // MyClass
console.log(MyClass.name); // MyClass
However: beware that the name will likely be different when using minified code.
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Preventing form resubmission
Page one contains an HTML form. Page two - the code that handles the submitted data.
12 Answers
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Bigger Glyphicons
...tton, and this button was a little bigger. So I just gave "font-size:95%" for my glyphicon and it was solved.
– victorf
Jan 22 '16 at 17:26
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How do I send a file as an email attachment using Linux command line?
...ccomplish is to send that tar file through email to a remote email server for safekeeping. I've been able to send the raw script in the body an email by piping the backup text file to mailx like so:
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django MultiValueDictKeyError error, how do I deal with it
... to save a object to my database, but it's throwing a MultiValueDictKeyError error.
7 Answers
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How to check that a string is a palindrome using regular expressions?
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The answer to this question is that "it is impossible". More specifically, the interviewer is wondering if you paid attention in your computational theory class.
In your computational theory class you learned about finite state machines. A finite state machine is composed of nodes...
How to bind function arguments without binding this?
...but best to avoid thinking of it as "binding" since that is the term used for setting the "this" value. Perhaps think of it as "wrapping" the arguments into a function?
What you do is create a function that has the desired arguments built into it via closures:
var withWrappedArguments = function(...