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Rails 4: List of available datatypes
...SchemaStatements.html#method-i-add_column
These are the same as with Rails 3.
If you use PostgreSQL, you can also take advantage of these:
:hstore
:json
:jsonb
:array
:cidr_address
:ip_address
:mac_address
They are stored as strings if you run your app with a not-PostgreSQL database.
Edit, 201...
Plot two graphs in same plot in R
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637
lines() or points() will add to the existing graph, but will not create a new window. So you'd ...
Why is #!/usr/bin/env bash superior to #!/bin/bash?
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237
#!/usr/bin/env searches PATH for bash, and bash is not always in /bin, particularly on non-Linu...
How can I beautify JavaScript code using Command Line?
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treat your mods well
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answered Aug 26 '08 at 3:22
Alan StormAlan Storm
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How can I get Express to output nicely formatted HTML?
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313
In your main app.js or what is in it's place:
Express 4.x
if (app.get('env') === 'developmen...
RGB to hex and hex to RGB
...nentToHex(g) + componentToHex(b);
}
alert(rgbToHex(0, 51, 255)); // #0033ff
Converting the other way:
function hexToRgb(hex) {
var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
return result ? {
r: parseInt(result[1], 16),
g: parseInt(result[2], 16),...
Does Python SciPy need BLAS?
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143
The SciPy webpage used to provide build and installation instructions, but the instructions ther...
Does C have a “foreach” loop construct?
... count; keep; keep = !keep)
And can be used like
int values[] = { 1, 2, 3 };
foreach(int *v, values) {
printf("value: %d\n", *v);
}
Edit: In case you are also interested in C++ solutions, C++ has a native for-each syntax called "range based for"
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Simplest code for array intersection in javascript
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