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What are the uses of the exec command in shell scripts? [closed]
...n anyone explain what are the uses of the exec command in shell scripting with simple examples?
2 Answers
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Differences between Proxy and Decorator Pattern
...corators have a different purpose. A decorator adds one or more responsibilities to an object, whereas a proxy controls access to an object.
Proxies vary in the degree to which they are implemented like a decorator. A
protection proxy might be implemented exactly like a decorator. On the othe...
Storing Objects in HTML5 localStorage
...oking at the Apple, Mozilla and Mozilla again documentation, the functionality seems to be limited to handle only string key/value pairs.
A workaround can be to stringify your object before storing it, and later parse it when you retrieve it:
var testObject = { 'one': 1, 'two': 2, 'three': 3 };
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__FILE__, __LINE__, and __FUNCTION__ usage in C++
... exists in C99 / C++11. The others (__LINE__ and __FILE__) are just fine.
It will always report the right file and line (and function if you choose to use __FUNCTION__/__func__). Optimization is a non-factor since it is a compile time macro expansion; it will never effect performance in any way.
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How do I fix the Visual Studio compile error, “mismatch between processor architecture”?
...ion in Visual Studio 2010, but I've done some research and still can't quite figure this issue out. I have a Visual Studio solution with a C++ DLL referencing the C# DLL. The C# DLL references a few other DLLs, some within my project and some external. When I try to compile the C++ DLL, I get this...
Build tree array from flat array in javascript
I have a complex json file that I have to handle with javascript to make it hierarchical, in order to later build a tree.
Every entry of the json has :
id : a unique id,
parentId : the id of the parent node (which is 0 if the node is a root of the tree)
level : the level of depth in the tree
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Dynamically changing font size of UILabel
...berOfLines = 1;
factLabel.minimumFontSize = 8;
factLabel.adjustsFontSizeToFitWidth = YES;
The above code will adjust your text's font size down to (for example) 8 trying to fit your text within the label.
numberOfLines = 1 is mandatory.
Multiple lines:
For numberOfLines > 1 there is a method...
Android - SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length
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I have run into the same error entries in LogCat. In my case it's caused by the 3rd party keyboard I am using. When I change it back to Android keyboard, the error entry does not show up any more.
share
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Is double square brackets [[ ]] preferable over single square brackets [ ] in Bash?
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[[ has fewer surprises and is generally safer to use. But it is not portable - POSIX doesn't specify what it does and only some shells support it (beside bash, I heard ksh supports it too). For example, you can do
[[ -e $b ]]
to test whether a file exists. But with [, you have t...
StringBuilder vs String concatenation in toString() in Java
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Version 1 is preferable because it is shorter and the compiler will in fact turn it into version 2 - no performance difference whatsoever.
More importantly given we have only 3
properties it might not make a
difference, but at what point do you
sw...