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How to check file MIME type with javascript before upload?
...r = "";
for(var i = 0; i < arr.length; i++) {
header += arr[i].toString(16);
}
console.log(header);
// Check the file signature against known types
};
fileReader.readAsArrayBuffer(blob);
You can then determine the real MIME type like so (more file signatures here and here):
swit...
Async image loading from url inside a UITableView cell - image changes to wrong image while scrollin
...= [UIImage imageNamed:@"placeholder.png"];
NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"http://myurl.com/%@.jpg", self.myJson[indexPath.row][@"movieId"]]];
NSURLSessionTask *task = [[NSURLSession sharedSession] dataTaskWithURL:url completionHandler:^(NSData * _Nullable da...
How to Implement DOM Data Binding in JavaScript
... being the object that you wish to define a new property for, the second a string resembling the the name of the new property and the last a "descriptor object" providing information on the behavior of the new property.
Two particularly interesting descriptors are get and set. An example would look...
Failed to serialize the response in Web API with Json
...make things more confusing.
Example:
public class UserModel {
public string Name {get;set;}
public string Age {get;set;}
// Other properties here that do not reference another UserModel class.
}
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filtering NSArray into a new NSArray in Objective-C
... it may just be easier to convert the function's conditions to a predicate string.
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Multiline bash commands in makefile
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If you want to break a string in bash/perl/script inside makefile, close the string quote, backslash, newline, (no indentation) open string quote. Example; perl -e QUOTE print 1; QUOTE BACKSLASH NEWLINE QUOTE print 2 QUOTE
–...
What's the best way to put a c-struct in an NSArray?
...re, and checked at compilation - much safer than pulling an arbitrary byte string out of NSData/NSValue representations. they also have bounds checking and mostly automatic management of memory. (cont)
– justin
Dec 30 '10 at 0:38
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Co-variant array conversion from x to y may cause run-time exception
...x(); // compile time legal, runtime exception
And in more general terms
string[] array = new string[10];
object[] objs = array; // legal at compile time
objs[0] = new Foo(); // again legal, with runtime exception
In C#, you are allowed to reference an array of objects (in your case, LinkLabels)...
Can I have an IF block in DOS batch file?
...elon and @rkagerer are pointing out specific issues of a general rule that strings need to be quoted. You should never code IF %somevar%==example_string2 it should always be code so operand resolve to IF "value_of_somevar"=="example_string2" to avoid special characters in either st...
REST API Token-based Authentication
...the baseauth password. For improved robustness, I recommend using a random string instead of the timestamp as a "nonce" to prevent replay attacks (two legit requests could be made during the same second). Instead of providing seperate "shared secret" and "api key" fields, you can simply use the api ...