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Fundamental difference between Hashing and Encryption algorithms
...unknown data to the hash. So instead of finding anything that matches md5(foo), they need to find something that when added to the known salt produces md5(foo.salt) (which is very much harder to do). But it still doesn't solve the speed problem since if they know the salt it's just a matter of run...
Write to file, but overwrite it if it exists
... overwrite one file's content to another file. use cat eg.
echo "this is foo" > foobar.txt
cat foobar.txt
echo "this is bar" > bar.txt
cat bar.txt
Now to overwrite foobar we can use a cat command as below
cat bar.txt >> foobar.txt
cat foobar.txt
...
Default constructor with empty brackets
...nside functions. It's called local functions in C, and at least extern "C" foo();-style is also allowed in C++.
– Marc Mutz - mmutz
Aug 8 '09 at 10:20
4
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JSLint says “missing radix parameter”
...
I solved it with just using the +foo, to convert the string.
Keep in mind it's not great for readability (dirty fix).
console.log( +'1' )
// 1 (int)
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if…else within JSP or JSTL
...the following JSTL:
<c:choose>
<c:when test="${myvar.equals('foo')}">
...
</c:when>
<c:when test="${myvar.equals('bar')}">
...
</c:when>
<c:otherwise>
...
</c:otherwise>
</c:choose>
...
Java - get the current class name?
...in the context of anonymous handler class.
let's say:
class A {
void foo() {
obj.addHandler(new Handler() {
void bar() {
String className=A.this.getClass().getName();
// ...
}
});
}
}
it will achieve the same result....
Pipe subprocess standard output to a variable [duplicate]
...>>> output = proc.stdout.read()
>>> print output
bar
baz
foo
The command cdrecord --help outputs to stderr, so you need to pipe that indstead. You should also break up the command into a list of tokens as I've done below, or the alternative is to pass the shell=True argument but ...
jQuery Datepicker with text input that doesn't allow user input
...jQuery will still be able to edit its contents.
<input type='text' id='foo' readonly='true'>
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How to convert string into float in JavaScript?
...han one thousands separators, one way to do it is a regex global replace: /foo/g. Just remember that . is a metacharacter, so you have to escape it or put it in brackets (\. or [.]). Here's one option:
var str = '6.000.000';
str.replace(/[.]/g,",");
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How do I remove all .pyc files from a project?
... while **/*.pyc recursively scans the whole directory tree. As an example, foo/bar/qux.pyc will be deleted by rm **/*.pyc but not by */*.pyc.
The globstar shell options must be enabled. To enable globstar:
shopt -s globstar
and to check its status:
shopt globstar
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