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Determining whether jQuery has not found any element
...more clearance, you can also use if (!!$('#id').length), that do a boolean cast.
– Daniele Vrut
Aug 2 '14 at 21:58
6
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C++实现一款简单完整的聊天室服务器+客户端 - C/C++ - 清泛网 - 专注C/C++及内核技术
...imedwait(&condition,&mutex,&t);
}
if(toStop){
pthread_cond_broadcast(&condition);
pthread_mutex_unlock(&mutex);
return -1;
}
int messageLen = strlen(message);
int copyLen = messageLen>=MESSAGE_LENGTH?MESSAGE_LENGTH-1:messageLen;
memcpy(buf[rear],message,copyLen);
...
How to check for an undefined or null variable in JavaScript?
...s the truthiness. Which FYI is also equivalent to if (var) which will be cast to boolean, so basically completely useless...
– Cyril CHAPON
Jun 26 '18 at 9:42
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How to use GROUP BY to concatenate strings in MySQL?
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SELECT id, GROUP_CONCAT(CAST(name as CHAR)) FROM table GROUP BY id
Will give you a comma-delimited string
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Can't use modulus on doubles?
...onstexpr double dmod (T x, U mod)
{
return !mod ? x : x - mod * static_cast<long long>(x / mod);
}
//Usage:
double z = dmod<double, unsigned int>(14.3, 4);
double z = dmod<long, float>(14, 4.6);
//This also works:
double z = dmod(14.7, 0.3);
double z = dmod(14.7, 0);
double z ...
MySQL case insensitive select
...at do you mean exactly? The code works. When one side in the comparison is cast to binary the comparison is done binary.
– Jori
Jul 11 '14 at 13:01
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How to center align the cells of a UICollectionView?
... In ObjC object collectionViewLayout is used directly. It must be casted to UICollectionViewFlowLayout to be able to access to itemSize and minimumInteritemSpacing
– buttcmd
Jan 14 '19 at 8:04
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How to get an object's properties in JavaScript / jQuery?
...es are actually also objects with a limited selection of methods. They are cast into objects under the hood, when required. To know the base class name, you may invoke the Object.prototype.toString method on an object, like this:
alert(Object.prototype.toString.call([]));
The above will output [o...
Difference between getAttribute() and getParameter()
...getAttribute(String name) method, bear in mind that the attributes must be cast.
Additionally, there is no servlet specific attributes, and there are no session parameters.
This post is written with the purpose to connect on @Bozho's response, as additional information that can be useful for oth...
Prevent Android activity dialog from closing on outside touch
...hat uses the dialog style. Activity doesn't have this method, and can't be cast to Dialog.
– Fergusmac
Aug 24 '12 at 3:47
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