大约有 15,571 项符合查询结果（耗时：0.0273秒） [XML]
Why not use Double or Float to represent currency?
...float will probably look good at first as the software rounds off the tiny errors, but as you perform more additions, subtractions, multiplications and divisions on inexact numbers, errors will compound and you'll end up with values that are visibly not accurate. This makes floats and doubles inadeq...
Check if inputs are empty using jQuery
...e usability where it counts.
$('#signupform').submit(function() {
var errors = 0;
$("#signupform :input").map(function(){
if( !$(this).val() ) {
$(this).parents('td').addClass('warning');
errors++;
} else if ($(this).val()) {
$(this...
Using AES encryption in C#
... catch (Exception e)
{
Console.WriteLine("Error: {0}", e.Message);
}
}
static byte[] EncryptStringToBytes(string plainText, byte[] Key, byte[] IV)
{
// Check arguments.
if (plainText == null || plainText.Le...
ServiceStack vs ASP.Net Web API [closed]
...
Any DTO object -> serialized to Response ContentType
HttpResult, HttpError, CompressedResult (IHttpResult) for Customized HTTP response
The following types are not converted and get written directly to the Response Stream:
String
Stream
IStreamWriter
byte[] - with the application/octet-str...
iOS app error - Can't add self as subview
... @Kalle This solution works for push/pop. But how to solve this error if I use segue?
– Geek
Mar 14 '14 at 16:37
...
Elegant setup of Python logging in Django
...': False,
'handlers': {
'mail_admins': {
'level': 'ERROR',
'class': 'django.utils.log.AdminEmailHandler',
}
},
'loggers': {
'django.request': {
'handlers': ['mail_admins'],
'level': 'ERROR',
'propagate': ...
Objective-C: difference between id and void *
...tor in the context, likely casting on the way in and way out.
Fragile and error prone, but the only way.
Blocks solve this -- Blocks are closures for C. They are available in Clang -- http://llvm.org/ and are pervasive in Snow Leopard (http://developer.apple.com/library/ios/documentation/Performa...
What is PECS (Producer Extends Consumer Super)?
...lt;Number> numbers = new ArrayList<Integer>();//gets compile time error
Integer[] myInts = {1,2,3,4};
Number[] myNumber = myInts;
myNumber[0] = 3.14; //attempt of heap pollution i.e. at runtime gets java.lang.ArrayStoreException: java.lang.Double(we can fool compiler but not run-time)
Lis...
How to debug Apache mod_rewrite
...
You'll find the 2.4 log items in the relevant error log. This may depend on your configuration, but default Debian/Ubuntu setups have them in /var/log/apache2/error.log
– Josiah
May 8 '15 at 21:34
...
Check if bash variable equals 0 [duplicate]
...ro), but it requires two arguments. That is why you get the unary operator error message.
EDIT: As Doktor J mentioned in his comment to this answer, a safe way to avoid problems with unset variables in checks is to enclose the variables in "". See his comment for the explanation.
if [ "$depth" -e...