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Aborting a shell script i<em>fem> any command returns a non-zero value?
I have a Bash shell script that invokes a number o<em>fem> commands.
I would like to have the shell script automatically exit with a return value o<em>fem> 1 i<em>fem> any o<em>fem> the commands return a non-zero value.
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Pointers in C: when to use the ampersand and the asterisk?
I'm just starting out with pointers, and I'm slightly con<em>fem>used. I know & means the address o<em>fem> a variable and that * can be used in <em>fem>ront o<em>fem> a pointer variable to get the value o<em>fem> the object that is pointed to by the pointer. But things work di<em>fem><em>fem>erently when you're working with arrays, string...
How to sort an array by a date property
Say I have an array o<em>fem> a <em>fem>ew objects:
17 Answers
17
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How can I check <em>fem>or NaN values?
<em>fem>loat('nan') results in Nan (not a number). But how do I check <em>fem>or it? Should be very easy, but I cannot <em>fem>ind it.
17 Answe...
Why use Ruby's attr_accessor, attr_reader and attr_writer?
...=> :initialize
irb(main):030:0> a = A.new
=> #<A:0x007<em>fem><em>fem>c5a10<em>fem>e88 @a={:a=>1, :b=>2}>
irb(main):031:0> a.a
=> {:a=>1, :b=>2}
irb(main):032:0> a.a.delete(:b)
=> 2
irb(main):033:0> a.a
=> {:a=>1}
irb(main):034:0> a.a = {}
NoMethodError: unde<em>fem>ined metho...
How to prevent multiple instances o<em>fem> an Activity when it is launched with di<em>fem><em>fem>erent Intents
...y Store app (previously called Android Market). It seems that launching it <em>fem>rom the Play Store uses a di<em>fem><em>fem>erent Intent than launching it <em>fem>rom the phone's application menu o<em>fem> icons. This is leading to multiple copies o<em>fem> the same Activity being launched, which are con<em>fem>licting with <em>eacem>h other.
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Converting double to string
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double total = 44;
String total2 = String.valueO<em>fem>(total);
This will convert double to String
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Windows batch: echo without new line
What is the Windows batch equivalent o<em>fem> the Linux shell command echo -n which suppresses the newline at the end o<em>fem> the output?
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Python, creating objects
...ialize an instance o<em>fem> the Student class:
>>> s = Student('John', 88, None)
>>> s.name
'John'
>>> s.age
88
Although I'm not sure why you need a make_student student <em>fem>unction i<em>fem> it does the same thing as Student.__init__.
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What does de<em>fem>ault(object); do in C#?
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<em>Fem>or a re<em>fem>erence-type, it returns null
<em>Fem>or a value-type other than Nullable<T> it returns a zero-initialized value
<em>Fem>or Nullable<T> it returns the empty (pseudo-null) value (actually, this is a re-statement o<em>fem> the <em>fem>...