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Count character occurrences in a string in C++
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Small note, but the return type is typically signed. For some reason std::count returns type iterator_traits<InputIt>::difference_type, which for most standard containers is std::ptrdiff_t, not std::size_t.
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Writing/outputting HTML strings unescaped
...ert')</script>" + "Hello") + "</b>)")
Results in
(<b><script>console.log('insert')</script>Hello</b>)
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What does $_ mean in PowerShell?
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This is the variable for the current value in the pipe line, which is called $PSItem in Powershell 3 and newer.
1,2,3 | %{ write-host $_ }
or
1,2,3 | %{ write-host $PSItem }
For example in the above code the %{} block is called for every value in the array. The $_ or $PSItem variable ...
Open a link in browser with java button? [duplicate]
...DesktopSupported() ? Desktop.getDesktop() : null;
if (desktop != null && desktop.isSupported(Desktop.Action.BROWSE)) {
try {
desktop.browse(uri);
return true;
} catch (Exception e) {
e.printStackTrace();
}
}
return false...
Why do we need extern “C”{ #include } in C++?
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C and C++ are superficially similar, but each compiles into a very different set of code. When you include a header file with a C++ compiler, the compiler is expecting C++ code. If, however, it is a C header, then the compiler expects the data cont...
Watermark / hint text / placeholder TextBox
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This is a sample which demonstrates how to create a watermark textbox in WPF:
<Window x:Class="WaterMarkTextBoxDemo.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft...
Command line for looking at specific port
...ic port from the Windows command line? I know I can use netstat to examine all ports but netstat is slow and looking at a specific port probably isn't.
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How to include an '&' character in a bash curl statement
I'm trying to use curl in bash to download a webpage, but the & symbol in the URL isn't interpreted as a character as I would like. Any ideas on how I can convince bash that the symbol & is just a boring character and nothing special?
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What is the most efficient way to store a list in the Django models?
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This is probably what I will end up doing, but I was really hoping the underlying structure for this would have been built in. I guess I am to o lazy.
– grieve
Jul 10 '09 at 16:11
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Strings are objects in Java, so why don't we use 'new' to create them?
...ew String("abcd")] in Java are interned - this means that every time you refer to "abcd", you get a reference to a single String instance, rather than a new one each time. So you will have:
String a = "abcd";
String b = "abcd";
a == b; //True
but if you had
String a = new String("abcd");
Strin...