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How should I use Outlook to send code snippets?
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Pattern: Clear (Custom Color(RGB(253,253,217))), Style: Linked, Automatically update, Quick Style
Based on: HTML Preformatted
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Correct format specifier for double in printf
...).
Note that this is one place that printf format strings differ substantially from scanf (and fscanf, etc.) format strings. For output, you're passing a value, which will be promoted from float to double when passed as a variadic parameter. For input you're passing a pointer, which is not promoted...
Django: Get an object form the DB, or 'None' if nothing matches
...get(*args, **kwargs)
except model.DoesNotExist:
return None
Call it like this
foo = get_or_none(Foo, baz=bar)
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How do I see if Wi-Fi is connected on Android?
... does not
support multiple connected networks of the same type. Use
getAllNetworks() and getNetworkInfo(android.net.Network) instead.
NOTE3: public static final int TYPE_WIFI is now deprecated:
This constant was deprecated in API level 28.
Applications should instead use NetworkCapabilit...
Java: How to get input from System.console()
...Console class to get input from user but a null object is returned when I call System.console() . Do I have to change anything before using System.console?
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Getting attribute using XPath
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you can use:
(//@lang)[1]
these means you get all attributes nodes with name equal to "lang" and get the first one.
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Moving decimal places over in a double
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which prints:
12.34
This works because Double.toString(d) performs a small amount of rounding on your behalf, but it is not much. If you are wondering what it might look like without rounding:
System.out.println(new BigDecimal(0.1));
System.out.println(new BigDecimal(x));
prints:
0.100000000...
img tag displays wrong orientation
... Why in the world do images even have orientation metadata? If you really wanted to rotate the picture then wouldn't you just shift around the pixels and swap the width for the height?
– Jack Giffin
Oct 29 '17 at 1:02
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How to turn a String into a JavaScript function call? [duplicate]
...eId) {}. Once we have a reference to a function inside a variable, we can call this function by "calling the variable", i.e. fn(t.parentNode.id), which equals clickedOnItem(t.parentNode.id), which was what the OP wanted.
More full example:
/* Somewhere: */
window.settings = {
/* [..] Other setti...
Does .NET provide an easy way convert bytes to KB, MB, GB, etc.?
...}
And here's the original implementation I suggested, which may be marginally slower, but a bit easier to follow:
static readonly string[] SizeSuffixes =
{ "bytes", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB" };
static string SizeSuffix(Int64 value, int decimalPlaces = 1)
{...