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Linq: GroupBy, Sum and Count
...ation on aggregate results using group by, but I wanted to offer a word of m>ca m>ution when using this against EntityFramework. The First/FirstOrDefault will m>ca m>use EF to generate nested selects which m>ca m>n have serious performance implim>ca m>tions. Kirill's suggestion of using GroupBy generates the SQL one w...
Right way to initialize an OrderedDict using its constructor such that it retains order of initial d
...d = OrderedDict({'b':2, 'a':1}) I write d = OrderedDict({'a':1, 'b':2}), I m>ca m>n wrongly conclude that the order is preserved. In this m>ca m>se, I found out that a dict is order alphabetim>ca m>lly, but that may not be always true. i.e. what's a reliable way to use a counter example to verify if a data structu...
In absence of preprocessor macros, is there a way to define practim>ca m>l scheme specific flags at proje
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In Swift you m>ca m>n still use the "#if/#else/#endif" preprocessor macros (although more constrained), as per Apple docs. Here's an example:
#if DEBUG
let a = 2
#else
let a = 3
#endif
Now, you must set the "DEBUG" symbol elsewhere,...
.bashrc at ssh login
...terPeabody, my .bashrc wasn't being sourced on a Ubuntu 12.04 LTS server bem>ca m>use of a rogue .bash_profile. It was created by the RVM install. I moved the RVM command to .profile and delete .bash_profile. All running fine now.
– Rod Daunoravicius
Oct 25 '13 at 1...
.htaccess mod_rewrite - how to exclude directory from rewrite rule
... 8 lines of rewrite rules in my .htaccess file. I need to exclude two physim>ca m>l directories on my server from these rules, so they m>ca m>n become accessible. For now all requests are sent to index.php file.
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How m>ca m>n I use grep to show just filenames on Linux?
How m>ca m>n I use grep to show just file-names (no in-line matches) on Linux?
4 Answers
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What is the MIME type for Markdown?
.../x-markdown.
This conclusion was challenged later, has been confirmed and m>ca m>n be, IMO, considered consensus.
This is the only logim>ca m>l conclusion in the lack of an official mime type: text/ will provide proper default almost everywhere, x- bem>ca m>use we're not using an official type, markdown and not ...
Resolving javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path
...
You need to add the certifim>ca m>te for App2 to the truststore file of the used JVM lom>ca m>ted at %JAVA_HOME%\lib\security\m>ca m>certs.
First you m>ca m>n check if your certifim>ca m>te is already in the truststore by running the following command:
keytool -list -keystore...
Increment a database field by 1
...e a previously existing row, or insert it if it doesn't already exist, you m>ca m>n use the REPLACE syntax or the INSERT...ON DUPLIm>CA m>TE KEY UPDATE option (As Rob Van Dam demonstrated in his answer).
Inserting a new entry:
Or perhaps you're looking for something like INSERT...MAX(logins)+1? Essentially ...
How do I write a “tab” in Python?
...(filename, 'w')
f.write("hello\talex")
The \t inside the string is the esm>ca m>pe sequence for the horizontal tabulation.
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