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Merge/flatten an array of arrays
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Or in a shorter, sexier form: const flatten = (arr) => arr.reduce((flat, next) => flat.concat(next), []);
– Tsvetomir Tsonev
Aug 8 '16 at 14:18
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AngularJS ngClass conditional
... third attempt.
Just to complement: You can also use logical operators to form logical expressions like
ng-class="{'test': obj.value1 == 'someothervalue' || obj.value2 == 'somethingelse'}"
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What's the role of adapters in Android?
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This is the same information that I can get from documentation. But I want a detailed explanation
– Robin
Sep 9 '10 at 14:12
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Displaying Windows command prompt output and redirecting it to a file
...is executed even if dir command failed. This is useful when there was some form of error in your command and you still want to see the log file on the console. See Microsoft's article on this. However, this has the issue of %errorlevel% being set to the error level of type (which would be 0).
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Why can't I do ?
...ly a disturbance. You CAN upload user files to the server with AJAX from a form with <input type=file> field, but if you want to be nice to the user and show a preview, you HAVE to do the round trip and upload the file to the server first. How is it more secure than generating the preview imag...
How do you automatically set the focus to a textbox when a web page loads?
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In HTML there's an autofocus attribute to all form fields. There's a good tutorial on it in Dive Into HTML 5. Unfortunately it's currently not supported by IE versions less than 10.
To use the HTML 5 attribute and fall back to a JS option:
<input id="my-input" autof...
Parsing query strings on Android
... own is better", but rather that it's great to have good material for an informed decision in my own code.
– Hanno Fietz
May 23 '11 at 10:55
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How to display the function, procedure, triggers source code in postgresql?
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26599 | tbl_tmp
(1 row)
step 3: list the table information
skytf=> \d tbl_tmp
It will show you the details of the trigger of the table . Usually a trigger uses a function. So you can get the source code of the trigger function just as the above that I pointed ...
What is a predicate in c#? [duplicate]
...conception developers have is that if something takes one line, it must perform better than something that takes ten lines. But behind the scenes, the Find method, which takes a Predicate<T>, is just enumerating after all. The same is true for a lot of Linq's functionality.
So let's take a lo...
Using Regular Expressions to Extract a Value in Java
I have several strings in the rough form:
13 Answers
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