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Check whether variable is number or string in JavaScript
Does anyone know how can I check whether a variable is a number or a string in JavaScript?
32 Answers
...
Reflection - get attribute name and value on property
...e dynamic by passing types into the routine):
public static Dictionary<string, string> GetAuthors()
{
Dictionary<string, string> _dict = new Dictionary<string, string>();
PropertyInfo[] props = typeof(Book).GetProperties();
foreach (PropertyInfo prop in props)
{
...
Better to 'try' something and catch the exception or test if it's possible first to avoid an excepti
...ept over if/else if that results in
speed-ups (for example by preventing extra lookups)
cleaner code (fewer lines/easier to read)
Often, these go hand-in-hand.
speed-ups
In the case of trying to find an element in a long list by:
try:
x = my_list[index]
except IndexError:
x = 'NO_AB...
What does the question mark in Java generics' type parameter mean?
...tract subclasses, but also sub-interfaces: List<? extends Collection<String>> list = new ArrayList<List<String>>();.
– Mark Peters
Jun 10 '10 at 15:08
...
How to pretty print XML from Java?
I have a Java String that contains XML, with no line feeds or indentations. I would like to turn it into a String with nicely formatted XML. How do I do this?
...
Utils to read resource text file to String (Java) [closed]
Is there any utility that helps to read a text file in the resource into a String. I suppose this is a popular requirement, but I couldn't find any utility after Googling.
...
How can I do an asc and desc sort using underscore.js?
...unction(num){
return num * -1;
}); // [3, 2, 1]
If you're sorting by strings not numbers, you can use the charCodeAt() method to get the unicode value.
//Descending Order Strings:
_.sortBy(['a', 'b', 'c'], function(s){
return s.charCodeAt() * -1;
});
...
xtree(1796): warning C4800: “int”: 将值强制为布尔值“true”或“false...
..._Tree_iterator<std::_Tree_val<std::_Tree_simple_types<std::pair<const std::string,CPTCensorStatusItem *>>>>,
1> _Ty2=bool,
1> _Traits=std::_Tmap_traits<std::string,CPTCensorStatusItem *,CGraphFrame::Compare<std::string>,std::allocator<std::pair<const std::string,CPTCensor...
Set the maximum character length of a UITextField
...tField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
// Prevent crashing undo bug – see note below.
if(range.length + range.location > textField.text.length)
{
return NO;
}
NSUInteger newLength = [textField.t...
Why not inherit from List?
...X>> { ... }. Now it's as easy as doing var list = new MyList<int, string>();.
CA1002: Do not expose generic lists: Basically, even if you plan to use this app as the sole developer, it's worthwhile to develop with good coding practices, so they become instilled into you and second nature...