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Regular expression for floating point numbers
...g a floating point number is
[+-]?([0-9]*[.])?[0-9]+
This will match:
123
123.456
.456
See a working example
If you also want to match 123. (a period with no decimal part), then you'll need a slightly longer expression:
[+-]?([0-9]+([.][0-9]*)?|[.][0-9]+)
See pkeller's answer for a fuller...
How to filter object array based on attributes?
...ou can use the Array.prototype.filter method:
var newArray = homes.filter(function (el) {
return el.price <= 1000 &&
el.sqft >= 500 &&
el.num_of_beds >=2 &&
el.num_of_baths >= 2.5;
});
Live Example:
var obj = {
'homes': [{...
How to determine a Python variable's type?
...
Use the type() builtin function:
>>> i = 123
>>> type(i)
<type 'int'>
>>> type(i) is int
True
>>> i = 123.456
>>> type(i)
<type 'float'>
>>> type(i) is float
True
To check if a variable is of a given type, u...
Android selector & text color
...u'll need to set a click listener.
private var isPressed = false
private fun TextView.setListener() {
this.setOnClickListener { v ->
run {
if (isPressed) {
v.isSelected = false
v.clearFocus()
} else {
v.isSelect...
Check if a String contains numbers Java
...
}
}
return sb.toString();
}
Examples:
For input "123abc", the method above will return 123.
For "abc1000def", 1000.
For "555abc45", 555.
For "abc", will return an empty string.
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How to unset a JavaScript variable?
...hen the target isn't an object property. e.g.,
(function() {
var foo = 123;
delete foo; // wont do anything, foo is still 123
var bar = { foo: 123 };
delete bar.foo; // foo is gone
}());
But since global variables are actually members of the window object, it works.
When prototype c...
Restore the state of std::cout after manipulating it
... {
boost::io::ios_flags_saver ifs(x);
x << std::hex << 123;
}
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REST URI convention - Singular or plural name of resource while creating it
...ll likely error, as this request doesn't make any sense, whereas /resource/123 makes perfect sense.
Using /resource instead of /resources is similar to how you would do this if you were working with, say, a file system and a collection of files and /resource is the "directory" with the individual 1...
How do I create multiple submit buttons for the same form in Rails?
...
Similar solution to one suggested by @vss123 without using any gems:
resources :plan do
post :save, constraints: lambda {|req| req.params.key?(:propose)}, action: :propose
post :save, constraints: lambda {|req| req.params.key?(:finalize)}, action: :finalize
end...
Escaping HTML strings with jQuery
...p;#39;',
'/': '&#x2F;',
'`': '&#x60;',
'=': '&#x3D;'
};
function escapeHtml (string) {
return String(string).replace(/[&<>"'`=\/]/g, function (s) {
return entityMap[s];
});
}
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