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How to prepend a string to a column value in MySQL?
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You can use the CONCAT function to do that:
UPDATE tbl SET col=CONCAT('test',col);
If you want to get cleverer and only update columns which don't already have test prepended, try
UPDATE tbl SET col=CONCAT('test',col)
WHERE c...
Size of font in CSS with slash
...ation:
The syntax of this property is based on a traditional typographical shorthand notation to set multiple properties related to fonts.
As David M said in the comments, it mirrors the typesetting tradition of specifying typeface sizes as “x pt on y pt” to denote the glyph size on li...
Are nullable types reference types?
...able struct.
and
Nullable types represent value-type variables that can be assigned the value of null. You cannot create a nullable type based on a reference type. (Reference types already support the null value.)
So, no they're not reference types.
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Python: Append item to list N times
...method is only a good idea for constant values, like ints or strings, is because only a shallow copy is does when using the <list>*<number> syntax, and thus if you did something like [{}]*100, you'd end up with 100 references to the same dictionary - so changing one of them would change ...
What are the Differences Between “php artisan dump-autoload” and “composer dump-autoload”?
...bit different:
1) It will in fact use Composer for some stuff
2) It will call Composer with the optimize flag
3) It will 'recompile' loads of files creating the huge bootstrap/compiled.php
4) And also will find all of your Workbench packages and composer dump-autoload them, one by one.
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Java: PrintStream to String?
...tream to which to print, and outputs a representation of that object. How can I capture this function's output in a String? Specifically, I want to use it as in a toString method.
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Django queries - id vs pk
When writing django queries one can use both id/pk as query parameters.
2 Answers
2
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What is the difference between Class.this and this in Java
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In this case, they are the same. The Class.this syntax is useful when you have a non-static nested class that needs to refer to its outer class's instance.
class Person{
String name;
public void setName(String name){
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Numpy how to iterate over columns of array?
...1, 0, 2):
do_stuff(c)
See the docs on how array.transpose works. Basically you are specifying which dimension to shift. In this case we are shifting the second dimension (e.g. columns) to the first dimension.
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Add a fragment to the URL without causing a redirect?
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window.location.hash = 'something';
That is just plain JavaScript.
Your comment...
Hi, what I really need is to add only the hash... something like this: window.location.hash = '#'; but in this way nothing is added.
Try this....