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When saving, how can you check if a field has changed?
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Really perfect, and do not perform extra query. Thanks a lot !
– Stéphane
Mar 4 '13 at 10:26
29
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How does a hash table work?
...s that computers (and their algorithms) deal with numbers better than with strings. So accessing a large array using an index is significantly much faster than accessing sequentially.
As Simon has mentioned which I believe to be very important is that the hashing part is to transform a large space...
Initialize a byte array to a certain value, other than the default null? [duplicate]
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var array = Encoding.ASCII.GetBytes(new string(' ', 100));
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How do you print out a stack trace to the console/log in Cocoa?
...#import <UIKit/UIKit.h>
#import "AppDelegate.h"
int main(int argc, char *argv[])
{
@autoreleasepool {
int retval;
@try{
retval = UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
}
@catch (NSException *exception)
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React.js: onChange event for contentEditable
...opTypes.func,
onChange: PropTypes.func.isRequired,
text: PropTypes.string,
placeholder: PropTypes.string,
editable: PropTypes.bool
},
getDefaultProps() {
return {
component: React.DOM.div,
editable: false
};
},
getInitialState() {
return {
init...
What does the @ symbol represent in objective-c?
...@ symbol. It is used in different scenarios, for example at the start of a string or to synthesise accessor methods.
4 Ans...
Getting a structural type with an anonymous class's methods from a macro
...an instance of a structural type with the named member. */
def bar(name: String): Any = macro bar_impl
def bar_impl(c: Context)(name: c.Expr[String]) = {
import c.universe._
val anon = TypeName(c.freshName)
// next week, val q"${s: String}" = name.tree
val Literal(Constant(s: St...
WebRTC - scalable live stream broadcasting / multicasting
...the browser to the server and from there, I built and plugged a GStreamer pipeline to transcode the feed.You can do this too!
– nschoe
Apr 20 '16 at 7:49
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INSERT with SELECT
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22 and '22' should not matter to sql, but I put a string in case that the field is similar to an unique identifier.
– Dumitrescu Bogdan
Mar 22 '11 at 12:54
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keytool error :java.io.IoException:Incorrect AVA format
...on at all. This was corrected by setting the option to a validly formatted string.
this command failed with the AVA format exception: (line breaks added for legibility)
C:\Program Files\Java\jdk1.6.0_45\jre\bin>keytool
-genkey -v -dname PatrickTaylor -validity 10000
-keystore C:\drops\patrick...