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Is there a practical use for weak references? [duplicate]
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If you want to keep a reference to something as long as it is used elsewhere e.g. a Listener, you can use a weak reference.
WeakHashMap can be used as a short lived cache of keys to derived data. It can also be used to keep information about objects used else where and you don't...
Is there a Public FTP server to test upload and download? [closed]
... For download testing they provide fixed size files, you can choose which fits best to your test.
You can connect with username of anonymous and any password (e.g. anonymous ).
You can upload files to upload folder. You can't create new folder here.
Your file is deleted immediately after successful...
How to change href of tag on button click through javascript
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Without having a href, the click will reload the current page, so you need something like this:
<a href="#" onclick="f1()">jhhghj</a>
Or prevent the scroll like this:
<a href="#" onclick="f1(); return false;...
How to remove the first commit in git?
I am curious about how to remove the first commit in git.
9 Answers
9
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Find all files with name containing string
...e. I have seen locate and find commands that can find files beginning with something first_word* or ending with something *.jpg .
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(How) can I count the items in an enum?
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There's not really a good way to do this, usually you see an extra item in the enum, i.e.
enum foobar {foo, bar, baz, quz, FOOBAR_NR_ITEMS};
So then you can do:
int fuz[FOOBAR_NR_ITEMS];
Still not very nice though.
But of course you do realize that just the number of items in an enum ...
How to limit setAccessible to only “legitimate” uses?
....reflect.AccessibleObject.setAccessible , the more astonished I am at what it can do. This is adapted from my answer to the question ( Using reflection to change static final File.separatorChar for unit testing ).
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How to send a message to a particular client with socket.io
I'm starting with socket.io + node.js, I know how to send a message locally and to broadcast socket.broadcast.emit() function:- all the connected clients receive the same message.
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Is it possible to set a number to NaN or infinity?
Is it possible to set an element of an array to NaN in Python?
4 Answers
4
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What's the best way to build a string of delimited items in Java?
While working in a Java app, I recently needed to assemble a comma-delimited list of values to pass to another web service without knowing how many elements there would be in advance. The best I could come up with off the top of my head was something like this:
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