大约有 40,000 项符合查询结果（耗时：0.0473秒） [XML]
Why are Oracle table/column/index names limited to 30 characters?
... VARCHAR2(2) doesn't mean 2 characters but 2 byte.
– Seth
Jan 26 '17 at 8:52
1
I see your point, ...
MSysGit vs. Git for Windows
...s will be in the method of compilation (i.e. compiler used and any options set) and any extraneous packaging (such as having a bash emulating shell as in msysgit). The actual product (Git itself) should remain broadly similar.
Edit: Thanks to Jarrod for pointing this out. I've left the above in f...
jQuery how to find an element based on a data-attribute value?
...
Notice that it doesn't work for elements where you set data with $('#element').data('some-att-name', value); but only for those with hardcoded attribute. I've got this problem and to make it work set data by writing the attribute directly $('#element').attr('data-some-att-nam...
How can I specify a local gem in my Gemfile?
...to use a different branch in development from production, you also have to set bundle config disable_local_branch_check true or Bundler will complain about the branch. Be careful with this though, as the checks are supposed to stop incorrect commits getting into Gemfile.lock. Docs here: bundler.io/v...
Is it faster to count down than it is to count up?
...uction with a smaller binary encoding
If a previous instruction happens to set a flag (likely only on x86 family machines), you might not even need an explicit compare instruction
Are these differences likely to result in any measurable improvement on real programs on a modern out-of-order process...
difference between throw and throw new Exception()
...es its original stack trace.
throw ex; throws the original exception but resets the stack trace, destroying all stack trace information until your catch block.
NEVER write throw ex;
throw new Exception(ex.Message); is even worse. It creates a brand new Exception instance, losing the original stac...
how do I use the grep --include option for multiple file types?
...
I recommend adding -I to the standard set. It skips binary files (which are hardly ever searched) hence boosts efficiency. Then we go grep -rIns ... which acousticly plays nicely:)
– bloody
May 1 at 20:36
...
How to select only 1 row from oracle sql?
... Yes. ROWNUM is a special column that gets added to the result set enumerating the results. You can use it to select multiple as well, for example, if you wanted to find the 10 highest payed employees, you might say "SELECT user FROM Employees WHERE ROWNUM <= 10 ORDER BY SALARY DESCEN...
How to run the sftp command with a password from Bash script?
...istory.
A more secure alternative which is available since LFTP 4.5.0 is setting the LFTP_PASSWORDenvironment variable and executing lftp with --env-password. Here's a full example:
LFTP_PASSWORD="just_an_example"
lftp --env-password sftp://user@host -e "put local-file.name; bye"
LFTP also inc...