syntax Archives - Page 10 of 15

How can I split a shell command over multiple lines when using an IF statement?

How can I split a command over multiple lines in the shell, when the command is part of an if statement? This works: ...

May 4, 2022
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What is the meaning of prepended double colon “::”?

I found this line of a code in a class which I have to modify: ::Configuration * tmpCo = m_configurationDB;//pointer to current db ...

May 4, 2022
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How do I modify a MySQL column to allow NULL?

MySQL 5.0.45 What is the syntax to alter a table to allow a column to be null, alternately what’s wrong with this: ALTER ...

May 4, 2022
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Best way to “negate” an instanceof

I was thinking if there exists a better/nicer way to negate an instanceof in Java. Actually, I’m doing something like: if(!(myObject instanceof SomeClass)) ...

May 4, 2022
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What’s the meaning of “=>” (an arrow formed from equals & greater than) in JavaScript?

I know that the >= operator means more than or equal to, but I’ve seen => in some source code. What’s the meaning ...

May 3, 2022
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Why are hexadecimal numbers prefixed with 0x?

Why are hexadecimal numbers prefixed as 0x? I understand the usage of the prefix but I don’t understand the significance of why 0x ...

May 3, 2022
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How do I pass multiple parameters into a function in PowerShell?

If I have a function which accepts more than one string parameter, the first parameter seems to get all the data assigned to ...

May 3, 2022
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How to concatenate strings in twig

Anyone knows how to concatenate strings in twig? I want to do something like: {{ concat('http://', app.request.host) }} 1Best Answer 11 This should ...

May 3, 2022
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How to escape % in String.Format?

I am storing a SQL query in my strings.xml file and I want to use String.Format to build the final string in code. ...

May 2, 2022
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What does map(&:name) mean in Ruby?

I found this code in a RailsCast: def tag_names @tag_names || tags.map(&:name).join(' ') end What does the (&:name) in map(&:name) mean? 16 s ...

May 2, 2022
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