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How do I use variables in Oracle SQL Developer?
...ues. As Alex points out, you can also do something similar using the "Run Script" function (F5) with the alternate EXEC syntax Alex suggests does.
variable v_count number;
variable v_emp_id number;
exec :v_emp_id := 1234;
exec select count(1) into :v_count from emp;
select *
from emp
where empn...
Do you need to use path.join in node.js?
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I don't understand this point. If you have those scripts in variables, why not just add a slash manually?
– mgol
Dec 20 '13 at 20:34
2
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Get the distance between two geo points
...e for all comparisons).
For more info see: http://www.movable-type.co.uk/scripts/latlong.html
There is a nice reference implementation of the Haversine formula in several languages at: http://www.codecodex.com/wiki/Calculate_Distance_Between_Two_Points_on_a_Globe
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Responsively change div size keeping aspect ratio [duplicate]
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You can do this using pure CSS; no JavaScript needed. This utilizes the (somewhat counterintuitive) fact that padding-top percentages are relative to the containing block's width. Here's an example:
.wrapper {
width: 50%;
/* whatever width you want */
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How to effectively work with multiple files in Vim
I've started using Vim to develop Perl scripts and am starting to find it very powerful.
28 Answers
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不同品牌的防火墙组成高可靠性集群 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...动脚本
[root@RS1 ~]# vi /etc/rc.d/rc.local
#!/bin/sh
#
# This script will be executed *after* all the other init scripts.
# You can put your own initialization stuff in here if you don't
# want to do the full Sys V style init stuff.
touch /var/lock/subsys/local
#新增加
/usr/l...
Jump to matching XML tags in Vim
...a vim plugin called matchit.vim . You can find it here: http://www.vim.org/scripts/script.php?script_id=39 . It was created pretty much the exact purpose you describe.
Install that, place your cursor on the body of the tag (not the <>, else it'll match those) and press % to jump to the other ...
Longest line in a file
... in a file. Ideally, it would be a simple bash shell command instead of a script.
14 Answers
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How to compile a 32-bit binary on a 64-bit linux machine with gcc/cmake
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It should do. You could also modify the cmake script to create a 32 bit target - it would just add -m32 to the CFLAGS, probably by setting CMAKE_REQUIRED_FLAGS.
– caf
Aug 13 '09 at 22:55
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Python AttributeError: 'module' object has no attribute 'Serial' [duplicate]
...access a serial port with Python 2.6 on my Raspberry Pi running Debian.
My script named serial.py tries to import pySerial:
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