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Remove the last three characters from a string
...s "read last 3 characters from string" This is later edited and I did not know, see the question edit history. Your comment helped me to correct my answer that became wrong after edit of the question.
– Adil
Jan 5 '16 at 4:55
...
What is the difference between Strategy pattern and Dependency Injection?
...e trying to achieve. The Strategy pattern is used in situations where you know that you want to swap out implementations. As an example, you might want to format data in different ways - you could use the strategy pattern to swap out an XML formatter or CSV formatter, etc.
Dependency Injection is d...
“Diff” an image using ImageMagick
...al image. Someone has written on an exact duplicate of the original image. Now, I need to compare the original to the written on image and extract just the writing in image format.
...
var functionName = function() {} vs function functionName() {}
... point of assignment:
// We can't call it here
xyz(); // UNDEFINED!!!
// Now it is defined
xyz = function(){}
// We can call it here
xyz(); // works
Function declaration vs. function expression is the real reason why there is a difference demonstrated by Greg.
Fun fact:
var xyz = function abc...
Android Fragments. Retaining an AsyncTask during screen rotation or configuration change
...is is pretty straightforward. I added a callback into this activity so it knows when the task is finished, but you might not need that. Mainly I just wanted to show the fragment-activity callback mechanism because it's quite neat and you might not have seen it before.
public class MainActivity exte...
How can I plot with 2 different y-axes?
...i at http://rwiki.sciviews.org/doku.php?id=tips:graphics-base:2yaxes, link now broken: also available from the wayback machine
Two different y axes on the same plot
(some material originally by Daniel Rajdl 2006/03/31 15:26)
Please note that there are very few situations where it is appropriate t...
What is the purpose of the EBP frame pointer register?
...
Frame pointer is a reference pointer allowing a debugger to know where local variable or an argument is at with a single constant offset. Although ESP's value changes over the course of execution, EBP remains the same making it possible to reach the same variable at the same offset (su...
What is the difference between compile and link function in angularjs
...SERVICE on a third directive (up), which does all three steps at the end.
Now, I want to walk through a couple of scenarios to show how one might go about using the compile and link to do various things:
SCENARIO 1: Directive as a MACRO
You want to add a directive (say ng-show) dynamically to som...
Why is “while ( !feof (file) )” always wrong?
...h output the situation is certainly just as bad as I described: you never know if that disk or that network buffer is full.)
So we conclude that it is impossible, and in fact unreasonable, to ask an I/O system whether it will be able to perform an I/O operation. The only possible way we can interact...
Difference between rake db:migrate db:reset and db:schema:load
...ails 3.2.12:
I just checked the source and the dependencies are like this now:
db:create creates the database for the current env
db:create:all creates the databases for all envs
db:drop drops the database for the current env
db:drop:all drops the databases for all envs
db:migrate runs migrations...