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Parse config files, environment, and command-line arguments, to get a single collection of options
...s.environ ), and command-line argument parsing ( argparse ). I want to write a program that does all those, and also:
11 ...
add column to mysql table if it does not exist
...o record in your database a revision number for the schema. Just a table with a single column and single row, with an integer indicating which revision is current in effect. When you update the schema, increment the number.
Another solution would be to just try the ALTER TABLE ADD COLUMN command....
What is the worst real-world macros/pre-processor abuse you've ever come across?
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From memory, it looked something like this:
#define RETURN(result) return (result);}
int myfunction1(args) {
int x = 0;
// do something
RETURN(x)
int myfunction2(args) {
int y = 0;
// do something
RETURN(y)
int...
Weak and strong property setter attributes in Objective-C
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You either have ARC on or off for a particular file. If its on you cannot use retain release autorelease etc... Instead you use strong weak for properties or __strong
__weak
for variables (defaults to __strong). Strong is the ...
What is the equivalent of “colspan” in an Android TableLayout?
I'm using a TableLayout in Android. Right now I have one TableRow with two items in it, and, below that, a TableRow with one item it it. It renders like this:
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Customizing Bootstrap CSS template
I am just getting started with Bootstrap from Twitter and am wondering what the ‘best practices’ is for customization. I want to develop a system that will take advantage of all the power of a css template (Bootstrap or other), be completely (and easily) modifiable, be sustainable (ie – when t...
JAX-RS — How to return JSON and HTTP status code together?
I'm writing a REST web app (NetBeans 6.9, JAX-RS, TopLink Essentials) and trying to return JSON and HTTP status code. I have code ready and working that returns JSON when the HTTP GET method is called from the client. Essentially:
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SQL JOIN vs IN performance?
...results... Which typically has better performance and why? How much does it depend on what database server you are running? (FYI I am using MSSQL)
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How can I escape a double quote inside double quotes?
... or ... [ -f $(which "$x") ]; ... work just fine. Issues would arise when either $x or the result of $(which "$x") gives anything with a space or other special character. A workaround is using a variable to hold the result of which, but is bash really incapable of escaping a quote or am I doing some...
Use rvmrc or ruby-version file to set a project gemset with RVM?
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If your .rvmrc file contains custom shell code, continue using .rvmrc as it allows you to include any shell code.
If your only aim is to switch Ruby versions, then use .ruby-version which is supported by other Ruby version switchers such as rbenv or chruby. This file also does not require trustin...