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Why should I avoid std::enable_if in function signatures
...lity: constructors don't have return types, and some operators cannot have extra arguments, so neither of the other two options can be applied everywhere. Putting enable_if in a template parameter works everywhere since you can only use SFINAE on templates anyway.
For me, the readability aspect is...
How do I check if a list is empty?
...“recommended” and No means “not recommended”):
For sequences, (strings, lists, tuples), use the fact that empty sequences are false.
Yes: if not seq:
if seq:
No: if len(seq):
if not len(seq):
sh...
How to validate an email address in JavaScript
...3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
return re.test(String(email).toLowerCase());
}
Here's the example of regular expresion that accepts unicode:
const re = /^(([^<>()\[\]\.,;:\s@\"]+(\.[^<>()\[\]\.,;:\s@\"]+)*)|(\".+\"))@(([^<>()[\]\.,;:\s@\"]+\.)+[^<&...
Reading a key from the Web.Config using ConfigurationManager
...
Try using the WebConfigurationManager class instead. For example:
string userName = WebConfigurationManager.AppSettings["PFUserName"]
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Check if a variable is of function type
...tion isFunction(functionToCheck) {
return functionToCheck && {}.toString.call(functionToCheck) === '[object Function]';
}
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Map enum in JPA with fixed values?
...s now possible with JPA 2.1:
@Column(name = "RIGHT")
@Enumerated(EnumType.STRING)
private Right right;
Further details:
http://java.dzone.com/articles/mapping-enums-done-right
http://www.thoughts-on-java.org/jpa-21-how-to-implement-type-converter/
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C/C++头文件string与string.h的区别及Mac平台的特殊性 - C/C++ - 清泛网 - ...
C/C++头文件string与string.h的区别及Mac平台的特殊性c_string_hstrlen() 等函数需要string h头文件，不过MacOS下clang编译器比较特殊，必须string，可以用宏区分Mac平台。string.h（C语言头文件，提供字符数组相关C函数）
string.h是C语言里面...
How do Mockito matchers work?
...dummy value, like 0 for anyInt() or any(Integer.class) or an empty List<String> for anyListOf(String.class). Because of type erasure, though, Mockito lacks type information to return any value but null for any() or argThat(...), which can cause a NullPointerException if trying to "auto-unbox" ...
Better way to get type of a Javascript variable?
...ines a new method 'toType' -
var toType = function(obj) {
return ({}).toString.call(obj).match(/\s([a-zA-Z]+)/)[1].toLowerCase()
}
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C#: Difference between List and Collection (CA1002, Do not expose generic lists) [duplicate]
...lity in mind it's very flexible. If in the future you decide you need some extra feature in the collection you can just extend it without any change to the public interface of the class. If you had used a list, you would have had to change it to a collection which means it would have broken all of t...