大约有 40,000 项符合查询结果（耗时：0.0663秒） [XML]
Check a collection size with JSTL
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As suggested by @Joel and @Mark Chorley in earlier comments:
${empty companies}
This checks for null and empty lists/collections/arrays. It doesn't get you the length but it satisfies the example in the OP. If you can get away with it ...
git replace local version with remote version
...remote/branch:subdir/
You can then (optionally) update your working copy by doing
git checkout-index -u --force
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Android studio logcat nothing to show
...can hit breakpoints. No filters are set. Log level is on Verbose. I fix it by repeatedly looping through the following:
Restart logcat (see Zatziky's answer above)
Change the log level to Debug (or anything else) and back to Verbose.
unplugging and plugging back in the device
running adb kill-serv...
Using sed and grep/egrep to search and replace
I am using egrep -R followed by a regular expression containing about 10 unions, so like:
.jpg | .png | .gif etc. This works well, now I would like to replace all strings found with .bmp
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How to get a substring of text?
...l"
a[/[aeiou](.)\1/, 2] #=> nil
a["lo"] #=> "lo"
a["bye"] #=> nil
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Convert integer into its character equivalent, where 0 => a, 1 => b, etc
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(10+n).toString(36);
Think about what you could do with all those extra bytes!
How this works is you convert the number to base 36, so you have the following characters:
0123456789abcdefghijklmnopqrstuvwxyz
^ ^
n n+10
By offsetting by 10 the characters start at a instead of 0.
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Why was the arguments.callee.caller property deprecated in JavaScript?
... global");
}
sillyFunction();
Anyhow, EcmaScript 3 resolved these issues by allowing named function expressions, e.g.:
[1,2,3,4,5].map(function factorial(n) {
return (!(n>1))? 1 : factorial(n-1)*n;
});
This has numerous benefits:
The function can be called like any other from inside...
Rolling back a remote Git repository
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You can rollback to a specific commit by using: git reset --hard [sha1] where sha1 is the commit hash identifier.
– pisaruk
Jul 17 '12 at 22:42
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Generating CSV file for Excel, how to have a newline inside a value
... characters (encoded in UTF-8) in the file, you should have a UTF-8 BOM (3 bytes, hex EF BB BF) at the start of the file. Otherwise Excel will interpret the data according to your locale's default encoding (e.g. cp1252) instead of utf-8, and your non-ASCII characters will be trashed.
Following comm...
How do I convert an integer to string as part of a PostgreSQL query?
...use the number can be up to 15 digits, you'll meed to cast to an 64 bit (8-byte) integer. Try this:
SELECT * FROM table
WHERE myint = mytext::int8
The :: cast operator is historical but convenient. Postgres also conforms to the SQL standard syntax
myint = cast ( mytext as int8)
If you have ...