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How to have conditional elements and keep DRY with Facebook React's JSX?
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The If style component is dangerous because the code block is always executed regardless of the condition. For example, this would cause a null exception if banner is null:
//dangerous
render: function () {
return (
<div id="page">
<If test={this.state.ban...
What's the cleanest way of applying map() to a dictionary in Swift?
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your last code block seems to be missing a try: return Dictionary<Key, OutValue>(try map { (k, v) in (k, try transform(v)) })
– jpsim
Nov 4 '15 at 0:19
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What can you do in MSIL that you cannot do in C# or VB.NET? [closed]
...in C# ("fault" is a like a "catch everything and rethrow at the end of the block" or "finally but only on failure")
There are lots of names which are forbidden by C# but legal IL
IL allows you to define your own parameterless constructors for value types.
You can't define events with a "raise" eleme...
How to get HttpClient to pass credentials along with the request?
...ally well. The asynchronous issue is not a problem, as I want the calls to block.
– adrianbanks
Oct 1 '12 at 14:51
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jQuery callback for multiple ajax calls
... negation operator (!) to evaluate to "true" (and therefore execute the if block), if decrementing inProgress results in inProgress == 0, and evaluates to "false" (and therefore does nothing) otherwise.
– Matt
Apr 28 '15 at 13:45
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How to write to a JSON file in the correct format
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Minor improvement: I suggest the block form: File.open(...){ |f| f << h.to_json }
– Phrogz
Mar 31 '11 at 23:41
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Is it possible to reference one CSS rule within another?
...}
.productBox, .imageBox {
--inherits: .test;
display: inline-block;
}
and equivalent HTML :
<div class="imageBox"></div>
I tested it and worked for me, even if rules are in different css files.
Update: I found a bug in hierarchichal inheritance in th...
Where is C not a subset of C++? [closed]
...e in the function declaration.
In C, it's possible to jump from outside a block to inside using a labeled statement. In C++, this isn't allowed if it skips an initialization.
C is more liberal in external linkage. In C, a global const variable is implicitly extern, and that's not true in C++. C...
Can I use conditional statements with EJS templates (in JMVC)?
... issue where I was putting my else on a different line like the first code block you mentioned. Thanks so much for including these examples!!
– Michael Platt
Jul 27 '17 at 20:30
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Can comments be used in JSON?
...ust released JSON.minify() which strips out comments and whitespace from a block of JSON and makes it valid JSON that can be parsed. So, you might use it like:
JSON.parse(JSON.minify(my_str));
When I released it, I got a huge backlash of people disagreeing with even the idea of it, so I decided...