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What platforms have something other than 8-bit char?
...hen, someone on SO points out that char (aka 'byte') isn't necessarily 8 bits .
12 Answers
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Can someone explain the traverse function in Haskell?
...o grok the traverse function from Data.Traversable . I am unable to see its point. Since I come from an imperative background, can someone please explain it to me in terms of an imperative loop? Pseudo-code would be much appreciated. Thanks.
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How do I watch a file for changes?
I have a log file being written by another process which I want to watch for changes. Each time a change occurs I'd like to read the new data in to do some processing on it.
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How to get a password from a shell script without echoing
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Here is another way to do it:
#!/bin/bash
# Read Password
echo -n Password:
read -s password
echo
# Run Command
echo $password
The read -s will turn off echo for you. Just replace the echo on the last line with the command you want to run.
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When can I use a forward declaration?
I am looking for the definition of when I am allowed to do forward declaration of a class in another class's header file:
1...
Why is Hibernate Open Session in View considered a bad practice?
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Because sending possibly uninitialised Proxies, especially collections, in the view layer and triggering hibernate loading from there can be troubling from both a performance and understanding point of view.
Understanding:
Using OSIV 'pollutes' the vie...
AES vs Blowfish for file encryption
... predecessor to Twofish. Twofish was Bruce Schneier's entry into the competition that produced AES. It was judged as inferior to an entry named Rijndael, which was what became AES.
Interesting aside: at one point in the competition, all the entrants were asked to give their opinion of how the ciph...
Best GWT widget library? [closed]
...se, see google article to know how to best design your client application with GWT: Building MVP apps
After, you can use any widget of these libraries (say a table, or a combobox, a datepicker, etc) and incorporate it to your project. Try to use extended components ONLY if you don't see a way to do...
Virtual Memory Usage from Java under Linux, too much memory used
I have a problem with a Java application running under Linux.
8 Answers
8
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How can I detect if a selector returns null?
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My favourite is to extend jQuery with this tiny convenience:
$.fn.exists = function () {
return this.length !== 0;
}
Used like:
$("#notAnElement").exists();
More explicit than using length.
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