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Adding data attribute to DOM
...o', '222');
Note that this doesn't create an actual data-info attribute. If you need to create the attribute, use .attr():
$('div').attr('data-info', '222');
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Difference between dict.clear() and assigning {} in Python
In python, is there a difference between calling clear() and assigning {} to a dictionary? If yes, what is it?
Example:
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Fade/dissolve when changing UIImageView's image
... UIImageViews , it seems logical to simply change the image of one view. If I do that, is there anyway of having a fade/cross dissolve between the two images rather than an instant switch?
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VIM ctrlp.vim plugin: how to rescan files?
...and hit F5 to refresh right then. It will automatically show you the match if the file was just added to the ctrl-p cache.
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Convert Enum to String
...way possible.
Any use of enum names does interfere with code obfuscation, if you consider obfuscation of enum names to be worthwhile or important - that's probably a whole other question.
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How can I use redis with Django?
...This is usually done by setting a TTL for the key: redis.io/commands/ttl . If the key expires, you must go to the DB. So if the key is in redis, then you use it. Note that the simple implementation of this causes some problems: when a popular key expires you have en.wikipedia.org/wiki/Thundering_her...
how perform grep operation on all files in a directory
...ld be sufficient. By default, grep would skip all subdirectories. However, if you want to grep through them, grep -r $PATTERN * is the case.
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libevent+protobuf轻松搭建tcpserver - C/C++ - 清泛网 - 专注C/C++及内核技术
...client_t *client = (client_t*)opaque;
size_t rdsz;
int sz;
if (client->total_len <= client->cur_size) {
// 读新请求
// 获得新请求的总长度
rdsz = bufferevent_read(ev_buf, &sz, sizeof(int));
client->total_len = sz;
// 开始读...
Read values into a shell variable from a pipe
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Use
IFS= read var << EOF
$(foo)
EOF
You can trick read into accepting from a pipe like this:
echo "hello world" | { read test; echo test=$test; }
or even write a function like this:
read_from_pipe() { read "$@" <&a...
Use rvmrc or ruby-version file to set a project gemset with RVM?
I use RVM, the Ruby Version Manager to specify a Ruby version and a set of gems for each of my Rails projects.
5 Answers
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