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Test if string is a number in Ruby on Rails
...def is_number? string
true if Float(string) rescue false
end
And then call it like this:
my_string = '12.34'
is_number?( my_string )
# => true
Extend String Class.
If you want to be able to call is_number? directly on the string instead of passing it as a param to your helper function, t...
Basic HTTP authentication with Node and Express 4
...he bare minimum you need: (you don't even need to parse the credentials at all)
function (req, res) {
//btoa('yourlogin:yourpassword') -> "eW91cmxvZ2luOnlvdXJwYXNzd29yZA=="
//btoa('otherlogin:otherpassword') -> "b3RoZXJsb2dpbjpvdGhlcnBhc3N3b3Jk"
// Verify credentials
if ( req.headers.a...
How to set top-left alignment for UILabel for iOS application?
...turn nil;
// set inital value via IVAR so the setter isn't called
_verticalAlignment = VerticalAlignmentTop;
return self;
}
-(VerticalAlignment) verticalAlignment
{
return _verticalAlignment;
}
-(void) setVerticalAlignment:(VerticalAlignment)value
{
_verticalAlignment = value...
Usage of protocols as array types and function parameters in swift
...help overcome this limitation in some cases.
struct AnyX {
private let _x: () -> Int
var x: Int { return _x() }
init<T: X>(_ some: T) {
_x = { some.x }
}
}
// Usage Example
struct XY: X {
var x: Int
var y: Int
}
struct XZ: X {
var x: Int
var z: In...
How to handle static content in Spring MVC?
...ping a webapp using Spring MVC 3 and have the DispatcherServlet catching all requests to '/' like so (web.xml):
23 Answer...
线程访问窗口资源的问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
...并行运行的窗口）。在工作线程里调用AfxGetMainWnd（）->m_hWnd出错，也会发生发生内存访问冲突。（AfxGetMainWnd得到的是当前线程的主窗口）。
2.ASSERT((p = pMap->LookupPermanent(m_hWnd)) != NULL ||
(p = pMap->LookupTemporary(m_hWnd)) != NULL)失败;从...
How can I pad an int with leading zeros when using cout
...ormatted output to a string (char* or char[]) not to console directly. Actually I am writing a function that returns formatted string
– shashwat
Dec 23 '12 at 9:32
14
...
Can you supply arguments to the map(&:method) syntax in Ruby?
... the shorthand block:
[['0', '1'], ['2', '3']].map(&:map.with(&:to_i))
# => [[0, 1], [2, 3]]
[%w(a b), %w(c d)].map(&:inject.with(&:+))
# => ["ab", "cd"]
[(1..5), (6..10)].map(&:map.with(&:*.with(2)))
# => [[2, 4, 6, 8, 10], [12, 14, 16, 18, 20]]
Here is a conve...
Difference between Pig and Hive? Why have both? [closed]
... answered Jul 28 '10 at 19:08
G__G__
6,49855 gold badges3232 silver badges5151 bronze badges
...
Eclipse - debugger doesn't stop at breakpoint
...en released against 6u16, 6u18 and 7b1). The best bet is to use -XX:+UseParallelGC flag. Increasing the size of the minimum and maximum heap size, to delay the first GC, bring temporary relief.
By the way, use this bug report in Eclipse to track how others have been faring.
...