When passing开发者_如何学运维 a non-existent value by reference, PHP creates the value and sets it to NULL. I noticed it when memory increases were occurring while checking empty values in some functi
I have an enum string name; public enum Color { Red, Green, Yellow } How to set it to NULL on load. name = \"\";
Why does (gci c:\\ddd).count on an Empty folder not return 0 but \"nothing\" I just get an Error \"You cannot call a method on a null-valued expression.\" When my count-condition does 开发者_如何学Py
I\'m completely new to databases and SQL. I have a column marked NOT NULL. When I forget to give a value to that column when doing an INSERT, it inserts a 0 value in that column.
How can I match null in rails active record. User.where([\'id = ? and active = ? and activatio开发者_Python百科n_code = ?\', params[:id], 0, NULL]).first
I have this HTML form page: form1.html <!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01//EN\" \"http://www.w3.org/TR/html4/strict.dtd\"
I like \"reinventing the wheel\" for learning purposes, so I\'m working on a container class for strings.Will using the NULL character as an array terminator (i.e., the last value in the array will be
I have recently written a php program that compiles a CSV into child and grandchild CSVs for later use. However, in certain files I keep getting NULL bytes in the same place. When writing the same str
Is there a way to configure Eclipse to automatically generate hashCode and equals with awareness of @NonNull annotations? Currently my Eclipse generates the code with unnecessary null checks, even on
The method in question (actually a polymorphically-implemented family of recursive search methods) returns a pointer to a certain type of object.I had been returning nil in cases开发者_如何转开发 of f
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