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Please explain some of Paul Graham's points on Lisp
...leteness,
;; we won't concern ourselves with it
(require '[clojure.contrib.string :as str])
;; this is the interesting bit:
(println (str/replace-re #"\d+" "FOO" "a123b4c56"))
This snippet of Clojure code prints out aFOObFOOcFOO. Note that Clojure arguably does not fully satisfy the fourth point o...
Function overloading by return type?
...e modern languages. The usual objection is that in code like
int func();
string func();
int main() { func(); }
you can't tell which func() is being called. This can be resolved in a few ways:
Have a predictable method to determine which function is called in such a situation.
Whenever such a ...
What is the id( ) function used for?
I read the Python 2 docs and noticed the id() function:
13 Answers
13
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Java - get the current class name?
...
Try,
String className = this.getClass().getSimpleName();
This will work as long as you don't use it in a static method.
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Delete specified file from document directory
...rror you are getting using the modified code below
- (void)removeImage:(NSString *)filename
{
NSFileManager *fileManager = [NSFileManager defaultManager];
NSString *documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *fi...
How to retrieve GET parameters from javascript? [duplicate]
...
It should also work for complex query strings...
– compile-fan
Mar 27 '11 at 10:20
1
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Converting Java objects to JSON with Jackson
...
ObjectWriter ow = new ObjectMapper().writer().withDefaultPrettyPrinter();
String json = ow.writeValueAsString(object);
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Double decimal formatting in Java
...
Use String.format:
String.format("%.2f", 4.52135);
As per docs:
The locale always used is the one returned by Locale.getDefault().
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Get the name of the currently executing method
...ns a symbol – for example, :test_method. To return the method name as a string, call __method__.to_s instead.
Note: This requires Ruby 1.8.7.
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'Missing contentDescription attribute on image' in XML
...e android:contentDescription
for my ImageView
android:contentDescription="@string/desc"
Android Lint support in ADT 16 throws this warning to ensure that
image widgets provide a contentDescription
This defines text that briefly describes the content of the view. This
property is used primarily for a...