大约有 40,000 项符合查询结果（耗时：0.0412秒） [XML]
How to get last N records with activerecord?
...at you want ('Something' is the model name):
Something.find(:all, :order => "id desc", :limit => 5).reverse
edit: As noted in the comments, another way:
result = Something.find(:all, :order => "id desc", :limit => 5)
while !result.empty?
puts result.pop
end
...
How to change credentials for SVN repository in Eclipse?
...se.
Just follow the following steps:
In your Eclipse,
Goto Window -> Show View -> Other -> (Type as) SVN Repositories -> click that(SVN Repositories) -> Right Click SVN Repositories -> Location Properties -> General tab change the following details for credentials.,
th...
How to check if a symlink exists
...( -e "${file}" \) ]
then
echo "%ERROR: file ${file} does not exist!" >&2
exit 1
elif [ ! \( -f "${file}" \) ]
then
echo "%ERROR: ${file} is not a file!" >&2
exit 2
elif [ ! \( -r "${file}" \) ]
then
echo "%ERROR: file ${file} is not readable!" >&2
e...
nodejs vs node on ubuntu 12.04
...to me as well. I had installed node from source some time ago. node -v => 0.10.2 while nodejs -v => 5.5.0. Running the command which node always pointed to this local installation. In the end, I had to unset NODE_PATH, which pointed to the local installation to fix it. After this, node -v ...
What does 'predicate' mean in the context of computer science? [duplicate]
...nction name-filter. Example: isBlue(arg), here Java predicate interface --> docs.oracle.com/javase/8/docs/api/java/util/function/…
– Hernán Eche
Oct 7 '15 at 18:40
...
Keep only first n characters in a string?
...2345678value';
var strshortened = str.slice(0,8);
alert(strshortened); //=> '12345678'
Using this, a String extension could be:
String.prototype.truncate = String.prototype.truncate ||
function (n){
return this.slice(0,n);
};
var str = '12345678value';
alert(str.truncate(8)); //=> '...
More lines in command window
...nswer(s) above, its also possible to export the lines to a txt file
using > fileName.txt
For example:
myProgram.exe > output.txt // will create a new file with all the output of myProgram
share
|
...
Python hashable dicts
...using frozenset(...) instead of tuple(sorted(...)) to generate the hash:
>>> import timeit
>>> timeit.timeit('hash(tuple(sorted(d.iteritems())))', "d = dict(a=3, b='4', c=2345, asdfsdkjfew=0.23424, x='sadfsadfadfsaf')")
4.7758948802947998
>>> timeit.timeit('hash(frozenset...
C-like structures in Python
...medtuple should be a list of the names of members. That list can be any length.
– ArtOfWarfare
Oct 14 '17 at 11:10
|
show 3 more comments
...
How do I URl encode something in Node.js?
...This is correct if you plan on using the string later as a query string:
> encodeURIComponent("http://examplé.org/rosé?rosé=rosé")
'http%3A%2F%2Fexampl%C3%A9.org%2Fros%C3%A9%3Fros%C3%A9%3Dros%C3%A9'
If you don't want ASCII characters like /, : and ? to be escaped, use encodeURI instead:
&...