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Cannot pass null argument when using type hinting
...on Type $t = null whereas if you need to make an argument accept both null and its type, you can follow above example.
You can read more here.
PHP 7.0 or older
You have to add a default value like
function foo(Type $t = null) {
}
That way, you can pass it a null value.
This is documented i...
What does iterator->second mean?
...const X, Y>s. That's exactly what a map is - it pairs together the keys and the associated values.
When you iterate over a std::map, you're iterating over all of these std::pairs. When you dereference one of these iterators, you get a std::pair containing the key and its associated value.
std::...
Relative paths based on file location instead of current working directory [duplicate]
...o is get the absolute path of the script (available via ${BASH_SOURCE[0]}) and then use this to get the parent directory and cd to it at the beginning of the script.
#!/bin/bash
parent_path=$( cd "$(dirname "${BASH_SOURCE[0]}")" ; pwd -P )
cd "$parent_path"
cat ../some.text
This will make your s...
What is the difference between require() and library()?
What is the difference between require() and library() ?
8 Answers
8
...
When should I make explicit use of the `this` pointer?
...re is a name ambiguity, where it can be used to disambiguate class members and local variables. However, here is a completely different case where this-> is explicitly required.
Consider the following code:
template<class T>
struct A {
int i;
};
template<class T>
struct B : A&lt...
Create timestamp variable in bash script
...ittle easier. I want to create the variable at the beginning of the script and have it print out the current time whenever I issue echo $timestamp . It proving to be more difficult then I thought. Here are some things I've tried:
...
Func vs. Action vs. Predicate [duplicate]
With real examples and their use, can someone please help me understand:
3 Answers
3
...
std::vector versus std::array in C++
What are the difference between a std::vector and an std::array in C++? When should one be preferred over another? What are the pros and cons of each? All my textbook does is list how they are the same.
...
How do I find the PublicKeyToken for a particular dll?
...e("c:\MyDLL.dll")).FullName
The output will provide the Version, Culture and PublicKeyToken as shown below:
MyDLL, Version=1.0.0.0, Culture=neutral, PublicKeyToken=669e0ddf0bb1aa2a
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JAVA线程池管理及分布式HADOOP调度框架搭建 - 人工智能(AI) - 清泛IT社区，...
平时的开发中线程是个少不了的东西，比如tomcat里的servlet就是线程，没有线程我们如何提供多用户访问呢？不过很多刚开始接触线程的开发攻城师却在这个上面吃了不少苦头。怎么做一套简便的线程开发模式框架让大家从单线...