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Test if string is a number in Ruby on Rails
...il 1154461.1 (±5.5%) i/s - 5788976 in 5.035311s
require 'benchmark/ips'
int = '220000'
bad_int = '22.to.2'
Benchmark.ips do |x|
x.report('cast') do
Integer(int) rescue false
end
x.report('cast fail') do
Integer(bad_int) rescue false
end
x.report('to_s') do
int.to_i....
自动生成Linux下Makefile全攻略（automake原理） - C/C++ - 清泛网 - 专注C/C++及内核技术
...定大家对Makefile自动化编译有基本的了解，Linux编译安装软件的方法的主要步骤及输出结果如下：1、. configure 输出Makefile文件2...本文假定大家对Makefile自动化编译有基本的了解（不了解的最好先熟悉下，参见《Makefile经典教程（...
Why must a lambda expression be cast when supplied as a plain Delegate parameter
...keRequired code pattern are very helpful.
– Erik Philips
Jan 9 '13 at 1:12
...
write a shell script to ssh to a remote machine and execute commands
...
There are multiple remote linux machines, and I need to write a shell script which will execute the same set of commands in each machine. (Including some sudo operations). How can this be done using shell scripting?
You can do this with ...
Connect Java to a MySQL database
... default 3306.
Download the JDBC driver and put in classpath, extract the ZIP file and put the containing JAR file in the classpath. The vendor-specific JDBC driver is a concrete implementation of the JDBC API (tutorial here).
If you're using an IDE like Eclipse or Netbeans, then you can add it to...
比尔盖茨“未来生活预言”的科技豪宅（图） - 资讯 - 清泛网 - 专注C/C++及内核技术
...样级别的霸道总裁，自然住得极其讲究。更何况，他是干软件出身，家里还不率先武装最先进的技术设备吗？他的宅第坐落在西雅图，外界称它是“未来生活预言”的科技豪宅，换句话说，他家就指引着数字生活的航向。
虽然...
How to configure socket connect timeout
When the Client tries to connect to a disconnected IP address, there is a long timeout over 15 seconds... How can we reduce this timeout? What is the method to configure it?
...
How to get execution time in rails console?
...be better to add another answer or comment with reference to the benchmark-ips gem? You've done quite a big edit to the answer there which changes it significantly and rather reduces the appropriateness of the votes on it already.
– Shadwell
Jan 2 '17 at 13:01
...
what happens when you type in a URL in browser [closed]
...TPS, no HTTP2, no extras), simplest possible DNS, no proxies, single-stack IPv4, one HTTP request only, a simple HTTP server on the other end, and no problems in any step. This is, for most contemporary intents and purposes, an unrealistic scenario; all of these are far more complex in actual use, a...
Why Does OAuth v2 Have Both Access and Refresh Tokens?
...ifies access token validation and makes it easier to scale and support multiple authorization servers. There is a window of time when an access token is valid, but authorization is revoked.
Indeed, in the situation where Resource Server and Authorization Server is the same entity, and where the ...