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Check if PHP session has already started
...a PHP file that is sometimes called from a page that has started a session and sometimes from a page that doesn't have session started. Therefore when I have session_start() on this script I sometimes get the error message for "session already started". For that I've put these lines:
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How do I provide a username and password when running “git clone git@remote.git”?
I know how to provide a username and password to an HTTPS request like this:
10 Answers
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What does middleware and app.use actually mean in Expressjs?
... haven't found a clear, concise explanation of what middleware actually is and what the app.use statement is doing. Even the express docs themselves are a bit vague on this. Can you explain these concepts for me please?
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What is the Comonad typeclass in Haskell?
...re's a good chance that we're dealing with a comonad".
Sequences, streams, and segments
Comonads in everyday life
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How to hash some string with sha256 in Java?
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You'd basically convert the string into bytes (e.g. using text.getBytes(StandardCharsets.UTF_8)) and then hash the bytes. Note that the result of the hash would also be arbitrary binary data, and if you want to represent that in a string, you should use base64 or hex... don't try to use the String(...
Smart pointers: who owns the object? [closed]
...a 'slave' for a shared_ptr, can't deallocate
auto_ptr - when the creation and deallocation happen inside the same function, or when the object has to be considered one-owner-only ever. When you assign one pointer to another, the second 'steals' the object from the first.
I have my own implementati...
What is PAGEIOLATCH_SH wait type in SQL Server?
...;value> order by <PrimaryKey>. We also have an index on just col1 and have tried rebuilding the index.
– Ryan
Mar 9 '09 at 15:36
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What's an elegant way to conditionally add a class to an HTML element in a view?
...lly you should represent success with boolean true or a numeric record ID, and failure with boolean false or nil. This way you can just test your variable:
<div class="<%= 'ok' if @success %>">
A second form using the ternary ?: operator is useful if you want to choose between two cl...
Logging best practices [closed]
I'd like to get stories on how people are handling tracing and logging in real applications. Here are some questions that might help to explain your answer.
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How can I replace every occurrence of a String in a file with PowerShell?
...ired:
Without the parenthesis the content is read, one line at a time, and flows down the pipeline until it reaches out-file or set-content, which tries to write to the same file, but it's already open by get-content and you get an error. The parenthesis causes the operation of content reading t...