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cannot convert data (type interface {}) to type string: need type assertion
... is an interface type, []i is not interface type. As a result, in order to convert []i to its value type, we have to do it individually:
// var items []i
for _, item := range items {
value, ok := item.(T)
dosomethingWith(value)
}
Performance
As for performance, it can be slower than dire...
Convert an image to grayscale in HTML/CSS
...ry ones too if you feel like it, apply that class to any image you want to convert to greyscale (works in Firefox >3.5, IE8).
edit: Here's a nice blog post which describes using the new CSS3 filter property in SalmanPK's answer in concert with the SVG approach described here. Using that approa...
How to calculate the time interval between two time strings
...erence between the two times. You can do whatever you want with that, e.g. converting it to seconds or adding it to another datetime.
This will return a negative result if the end time is earlier than the start time, for example s1 = 12:00:00 and s2 = 05:00:00. If you want the code to assume the in...
Convert JsonNode into POJO
...
In Jackson 2.4, you can convert as follows:
MyClass newJsonNode = jsonObjectMapper.treeToValue(someJsonNode, MyClass.class);
where jsonObjectMapper is a Jackson ObjectMapper.
In older versions of Jackson, it would be
MyClass newJsonNode = jso...
Spring MVC: Complex object as GET @RequestParam
...eturns the following error for request mentioned in answer:
"Failed to convert value of type 'java.lang.String[]' to required type
'java.lang.Long[]'; nested exception is
java.lang.NumberFormatException: For input string: \"353,234\""
The data class will work only for the following request...
HTML character decoding in Objective-C / Cocoa Touch
...hould be substituted.” More like character. This is text, not data; upon converting the text to data, the character may occupy multiple bytes, depending on the character and the encoding.
– Peter Hosey
Jul 9 '09 at 18:17
...
How to convert CharSequence to String?
How can I convert a Java CharSequence to a String ?
3 Answers
3
...
Changes in import statement python3
... In other words, if there was a Python package named base installed in the system, you'd get the wrong one.
Instead it requires you to use explicit imports which explicitly specify location of a module on a path-alike basis. Your derived.py would look like:
from .base import BaseThing
The leadin...
How to check if running in Cygwin, Mac or Linux?
... ends up calling whatever uname is first in your current path, which on my system turns out to be the version installed with geda which returns the text WindowsNT. It could equally be the MinGW version as described above, though. A reliable detection for cygwin must not rely on the path being set ...
Convert Django Model object to dict with all of the fields intact
How does one convert a Django Model object to a dict with all of its fields? All ideally includes foreign keys and fields with editable=False .
...