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String literals and escape characters in postgresql
...g character(s) represents a special byte value. \b is a backspace, \f is a form feed, \n is a newline, \r is a carriage return, \t is a tab. Also supported are \digits, where digits represents an octal byte value, and \xhexdigits, where hexdigits represents a hexadecimal byte value. (It is your resp...
Store images in a MongoDB database
...("./uploads/" + filename).pipe(writestream);
}
});
In your view:
<form action="/" method="post" enctype="multipart/form-data">
<input type="file" name="photos">
With this code you can add single as well as multiple images in MongoDB.
...
What are conventions for filenames in Go?
...an think of however. When specifying code to be compiled for different platforms, you use the platform name as a suffix:
mypkg_linux.go // only builds on linux systems
mypkg_windows_amd64.go // only builds on windows 64bit platforms
Also if you have a file called server.go, the tests for ...
Why would you use Expression rather than Func?
...ition of expressions, variables, method calls, ... (for example it holds information such as this lambda is some constant + some parameter). You can use this description to convert it to an actual method (with Expression.Compile) or do other stuff (like the LINQ to SQL example) with it. The act of t...
What is a “feature flag”?
...Trains to bog things down.
QA/Perf Testing in Production - real QA and performance testing is on production infrastructure with production traffic. Don’t waste time building extensive performance labs and staging environments.
Experimentation - know how a new feature moves the needle on your KPI...
What does the `forall` keyword in Haskell/GHC do?
...nderstand the existential notation in terms of its translation to the GADT form than on its own, but you are certainly free to think otherwise.
– dfeuer
Feb 8 '15 at 13:46
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For-each over an array in JavaScript
...
If the length of the array won't change during the loop, and it's in performance-sensitive code (unlikely), a slightly more complicated version grabbing the length up front might be a tiny bit faster:
var index, len;
var a = ["a", "b", "c"];
for (index = 0, len = a.length; index < len; ...
How to use sed to replace only the first occurrence in a file?
...ion to the POSIX specification for sed that allows the following 2-address form: 0,/re/ (re represents an arbitrary regular expression here).
0,/re/ allows the regex to match on the very first line also. In other words: such an address will create a range from the 1st line up to and including the li...
How do I specify the platform for MSBuild?
I am trying to use MSBuild to build a solution with a specified target platform (I need both binaries, x86 and x64). This is how I tried it:
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Prevent a webpage from navigating away using JavaScript
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But that's not enough. What about controls inside the form? They trigger this too.
– Fandango68
Mar 8 '17 at 1:59
1
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