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Using parameters in batch files at Windows command line
...nts one place, so that %0 takes the value of %1, %1 takes the value of %2, etc. %9 takes the value of the tenth argument (if one is present), which was not available through any variable before calling SHIFT (enter command SHIFT /? for more options).
SHIFT is also useful when you want to easily pro...
How to convert a string to lower or upper case in Ruby
... Rails Active Support gem provides upcase, downcase, swapcase,capitalize, etc. methods with internationalization support:
gem install activesupport
irb -ractive_support/core_ext/string
"STRING ÁÂÃÀÇÉÊÍÓÔÕÚ".mb_chars.downcase.to_s
=> "string áâãàçéêíóôõú"
"string áâ...
How to get ID of the last updated row in MySQL?
How do I get the ID of the last updated row in MySQL using PHP?
12 Answers
12
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MySQL error 2006: mysql server has gone away
...r to be a very low default setting of max_allowed_packet.
Raising it in /etc/my.cnf (under [mysqld]) to 8 or 16M usually fixes it. (The default in MySql 5.7 is 4194304, which is 4MB.)
[mysqld]
max_allowed_packet=16M
Note: Just create the line if it does not exist
Note: This can be set on you...
How can bcrypt have built-in salts?
... rainbow tables, which are lists of common passwords, or just brute force, etc... of different passwords but hashed. Without salt, the hash for a password in database A would be the same as a hash for a password in database B. Salt merely changes up the hash values making it harder for someone who...
What are queues in jQuery?
...ts[0].geometry.location;
map.setZoom(13);
map.setCenter(location);
new google.maps.Marker({ map: map, position: location });
}
// geocoder result returned, continue with animations:
next();
}
});
// after we find s...
How to construct a REST API that takes an array of id's for the resources
...ry parameters will be combined into an array. With the above query string, PHP happens to tell you that id equals [1, 2, 3], but Ruby on Rails tells you it equals 3, and other frameworks may also act differently, e.g. saying id equals 1. URLs like …?id=1,2,3 avoid this potential for confusion.
...
Avoid browser popup blockers
...ers can backtrack a little to see if the caller's caller was a mouse click etc. Keep it as shallow as you can to avoid the popup blockers.
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C/C++中的段错误（Segmentation fault） - C/C++ - 清泛网 - 专注C/C++及内核技术
...Segment fault 之永远的痛》(http://www.linuxforum.net/forum/gshowflat.php?Cat=&Board=program&Number=193239&page=2&view=collapsed&sb=5&o=all&fpart=1&vc=1)
在主题帖子里头，作者这么写道：
写程序好多年了，Segment fault 是许多C程序员头疼的提示。指针...
Is it possible to preview stash contents in git?
...0} to see a specific stash. 0 shows the last tone, 1 the second last one.. etc. git stash list will show all the available.
– brita_
Jul 18 '14 at 21:13
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