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  2. SQL Scripts - Does the equivalent of a #define exist?

    Feb 11, 2012 · Here is the script for those who might find it useful. I am using it to define the tables column widths and then use those same values in the stored procedures. This is due to the column widths have not yet been fully decided for production. I have also built in that you can define strings that last over a few lines.

  3. javascript: define a variable if it doesn't exist

    Apr 2, 2009 · To actually answer your question of WHY this is happening, it is because of variable hoisting.. Basically, there is a phase before executing code in the global scope or inside a function where the code is scanned for all var and function declarations (not to be confused with function expressions, but that's a different story).

  4. How do I set an environment variable in PowerShell if it doesn't …

    Aug 13, 2016 · ), it will exist for the current process and any child processes it creates only Thanks, PetSerAl. The following was mostly contributed by Ansgar Wiechers , with a supplement by Mathias R. Jessen : On Windows [*] , if you want to define an environment variable persistently , via the registry, you need to use the static SetEnvironmentVariable ...

  5. python - How do I check if a variable exists? - Stack Overflow

    May 9, 2009 · for i in generate_numbers(): do_something(i) try: use_last(i) except UnboundLocalError: pass # i didn’t exist because sequence was empty. The first solution may be problematic because I can’t tell (depending on the sequence values) whether i …

  6. How to check if a defined constant exists? - Stack Overflow

    I'm using a PHP framework called fuelphp, and I have this page that is an HTML file, so I can't use PHP in it. I have another file that has a top bar in it, which my HTML file will call through AJA...

  7. Can the C preprocessor be used to tell if a file exists?

    +1 for making the source code itself fully portable. I think this (or rather in my typical cases a modification where the file is assumed to exist by default and people can signal if they don't have the file) might even be my most preferred method of the ones I see here, because it's trivial to document the defines, and the typical user building from source can already be …

  8. How to check if object (variable) is defined in R?

    As others have pointed out, you're looking for exists.Keep in mind that using exists with names used by R's base packages would return true regardless of whether you defined the variable:

  9. Pythonic way to check if something exists? - Stack Overflow

    Feb 22, 2012 · It is always safe to define a variable before you use it (you will run into "assignment before local reference" which means " var is not in the scope " in plain English). If you do something with query, the chance is, you will want to have a dictionary, and checking whether a key exists or not, use in.

  10. The proper way of using Sequelize to define a exist table Model

    Oct 8, 2019 · but when i wanna define the model of this table i tried . var product = sequelize.define('product',{ name:Sequelize.STRING, barcode:Sequelize.STRING }); But in this way if i call seuqelize.sync() will create a table for me which is not what i want, i only wanna mapping the model relation to my ps_product table. so my questions are:

  11. c# - How do you use #define? - Stack Overflow

    Aug 19, 2008 · I'm wondering about instances when it makes sent to use #define and #if statements. I've known about it for a while, but never incorporated it into my way of coding. How exactly does this affect the