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What's the difference between echo, print, and print_r in PHP?
I use echo and print_r much, and almost never use print .
11 Answers
11
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method of iterating over sqlalchemy model's defined columns?
...and copy methods to a couple of models. I can't just iterate over the obj.__dict__ since it contains a lot of SA specific items.
...
Comparing strings with == which are declared final in Java
...llowing byte code:
Code:
0: ldc #2; //String str
2: astore_1
3: ldc #3; //String ing
5: astore_2
6: new #4; //class java/lang/StringBuilder
9: dup
10: invokespecial #5; //Method java/lang/StringBuilder."<init>":()V
13: aload_1
14: invo...
Checking images for similarity with OpenCV
...e the L2 relative error between images.
double errorL2 = norm( A, B, CV_L2 );
// Convert to a reasonable scale, since L2 error is summed across all pixels of the image.
double similarity = errorL2 / (double)( A.rows * A.cols );
return similarity;
}
else {
//Images have a differen...
How to master AngularJS? [closed]
...The hitchhiker's guide to the directive
Project structure - Check out this app
Angular-UI - Must use components for any UI development
UI-Bootstrap - From-scratch JS re-implementations of bootstrap
components as AngularJS directives
Full-Spectrum Testing with AngularJS and Karma
Bonus - Data binding...
Are list-comprehensions and functional functions faster than “for loops”?
...(<the code object for `[x for x in range(10)]`>)
1 0 BUILD_LIST 0
3 LOAD_FAST 0 (.0)
>> 6 FOR_ITER 12 (to 21)
9 STORE_FAST 1 (x)
12 LOAD_FAST 1 (x)
...
Calling JMX MBean method from a shell script
...
curl -s -X POST --user 'myuser:mypass'
--data "action=invokeOp&name=App:service=ThisServiceOp&methodIndex=3&arg0=value1&arg1=value1&submit=Invoke"
http://yourhost.domain.com/jmx-console/HtmlAdaptor
Beware: the method index may change with changes to the software. And the i...
Is it possible to set code behind a resource dictionary in WPF for event handling?
... behind: methods, properties and event handlers.
== Update for Windows 10 apps ==
And just in case you are playing with UWP there is one more thing to be aware of:
<Application x:Class="SampleProject.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
...
Set the location in iPhone Simulator
...ntry is "Location"; this gives you a sub menu with:
None
Custom Location
Apple Stores
Apple
City Bicycle Ride
City Run
Freeway Drive
Custom Location lets you enter a Lat/Long value. Bicycle ride, City Run, and Freeway Drive are simulation of a moving location (in Cupertino, of course).
Of cour...
Simplest way to do a fire and forget method in C#?
...
Thinking about this... in most applications this is fine, but in yours the console app will exit before FireAway sends anything to the console. ThreadPool threads are background threads and die when the app dies. On the other hand, using a Thread wouldn'...