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What is the difference between a field and a property?
...orm a field to a property with a few keystrokes. The answer might be technically correct about how properties work, but it does not give a good "OOP explanation" to their uses.
– sara
Feb 1 '16 at 16:05
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How to check null objects in jQuery
...eem to have enough reputation to vote down the answer...)
Wolf wrote:
Calling length property on undefined
or a null object will cause IE and
webkit browsers to fail!
Instead try this:
// NOTE!! THE FOLLOWING IS WRONG; DO NOT USE! -- EleotleCram
if($("#something") !== null){
// do...
Using the “start” command with parameters passed to the started program
...
None of these answers worked for me.
Instead, I had to use the Call command:
Call "\\Path To Program\Program.exe" <parameters>
I'm not sure this actually waits for completion... the C++ Redistributable I was installing went fast enough that it didn't matter
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JPA getSingleResult() or null
...w an exception. Actually since you're not doing a primary key lookup technically there could be multiple results (even if one, both or the combination of your foreign keys or constraints makes this impossible in practice) so this is probably the more appropriate solution.
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Getting the HTTP Referrer in ASP.NET
...k look with reflector shows that UrlReferrer does a lot more than a simple call to ServerVariables("HTTP_REFERER")
– Diadistis
Nov 23 '10 at 16:42
13
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How to convert a char to a String?
...u can use Character.toString(char). Note that this method simply returns a call to String.valueOf(char), which also works.
As others have noted, string concatenation works as a shortcut as well:
String s = "" + 's';
But this compiles down to:
String s = new StringBuilder().append("").append('s'...
/usr/lib/libstdc++.so.6: version `GLIBCXX_3.4.15' not found
...have been avoiding this issue in the past by simply linking libstdc++ statically with this parameter sent to g++ when linking my executable:
-static-libstdc++
If linking in the library statically is an option this is probably the quickest work-around.
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Why are static variables considered evil?
...our class to execute a particular function 10,000 times, once those 10,000 calls were done, and you delete your references to the single instance, all your static variables could be garbage collected and reused.
Prevents certain re-use:
Also, static methods cannot be used to implement an interface...
What is Java String interning?
...tp://docs.oracle.com/javase/7/docs/api/java/lang/String.html#intern()
Basically doing String.intern() on a series of strings will ensure that all strings having same contents share same memory. So if you have list of names where 'john' appears 1000 times, by interning you ensure only one 'john' is ...
Why does the default parameterless constructor go away when you create one with parameters
...on with certain parameters. What would new FileStream() even mean?
So basically, if you accept the premise that providing a default constructor makes sense at all, I believe it makes a lot of sense to suppress it as soon as you provide your own constructor.
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