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Possible Loss of Fraction
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169
When you divide two int's into a floating point value the fraction portion is lost. If you cas...
Heroku free account limited?
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Heroku provides, for free, a 5MB database
Heroku provides, for free, 1 dyno. A dyno is an instance of your application running and responding to requests. If each instance of your application can serve each request in 100ms, then you get 600 requests/minute with the free account.
Your applica...
Convert HH:MM:SS string to seconds only in javascript
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13 Answers
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Swift class introspection & generics
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109
Well, for one, the Swift equivalent of [NSString class] is .self (see Metatype docs, though th...
Regular expression to return text between parenthesis
...r problem is really just this simple, you don't need regex:
s[s.find("(")+1:s.find(")")]
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How to sort a list in Scala by two fields?
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217
rows.sortBy(r => (r.lastName, r.firstName))
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Timeout command on Mac OS X?
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130
You can use
brew install coreutils
And then whenever you need timeout, use
gtimeout
..i...
How do I update if exists, insert if not (AKA “upsert” or “merge”) in MySQL?
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191
Use INSERT ... ON DUPLICATE KEY UPDATE. For example:
INSERT INTO `usage`
(`thing_id`, `times_...
Django template tag to truncate text
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162
This has recently been added in Django 1.4. e.g.:
{{ value|truncatechars:9 }}
See doc here...
ZeroMQ实例-使用ZMQ(ZeroMQ)进行局域网内网络通信 - C/C++ - 清泛网 - 专注C/C++及内核技术
...实例-使用ZMQ(ZeroMQ)进行局域网内网络通信本文内容摘要：1）安装zeromq、2）实例说明使用zmq进行网络间的消息发送和接收首先在机器中安装zmq库步骤如下：1）下载zeromq的源代码，Zer...本文内容摘要：1）安装zeromq、2）实例说明使...