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Saving a Numpy array as an image
...Works with matplotlib 1.3.1, I don't know about lower version. From the docstring:
Arguments:
*fname*:
A string containing a path to a filename, or a Python file-like object.
If *format* is *None* and *fname* is a string, the output
format is deduced from the extension of the filename...
From io.Reader to string in Go
...
EDIT:
Since 1.10, strings.Builder exists. Example:
buf := new(strings.Builder)
n, err := io.Copy(buf, r)
// check errors
fmt.Println(buf.String())
OUTDATED INFORMATION BELOW
The short answer is that it it will not be efficient because co...
Looking for a clear definition of what a “tokenizer”, “parser” and...
...hes extra context to the tokens -- this token is a number, that token is a string literal, this other token is an equality operator.
A parser takes the stream of tokens from the lexer and turns it into an abstract syntax tree representing the (usually) program represented by the original text.
Las...
Writing string to a file on a new line every time
I want to append a newline to my string every time I call file.write() . What's the easiest way to do this in Python?
10 A...
Get keys from HashMap in Java
... with key "foo" and 2 with key "bar". To iterate over all the keys:
for ( String key : team1.keySet() ) {
System.out.println( key );
}
will print "foo" and "bar".
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Implications of foldr vs. foldl (or foldl')
...lue". I.e. remove the word "on". (Stackoverflow wouldn't let me submit a 2 char change!).
– Lqueryvg
Nov 26 '14 at 22:34
...
What is a NullPointerException, and how do I fix it?
...your code can help avoid null pointer exception. eg when checking an input string with a constant string you should start with the constant string like here: if ("SomeString".equals(inputString)) {} //even if inputString is null no exception is thrown. So there are a bunch of things that you can do ...
How does RegexOptions.Compiled work?
...nsidered "interpreted".
Take this example:
public static void TimeAction(string description, int times, Action func)
{
// warmup
func();
var watch = new Stopwatch();
watch.Start();
for (int i = 0; i < times; i++)
{
func();
}
watch.Stop();
Console.Wri...
Read environment variables in Node.js
...
If you want to use a string key generated in your Node.js program, say, var v = 'HOME', you can use
process.env[v].
Otherwise, process.env.VARNAME has to be hardcoded in your program.
...
Label Alignment in iOS 6 - UITextAlignment deprecated
...t property change is probably related to Apple’s introducing NSAttributedStrings to more of the iOS controls, and therefore needing to change the UIText… properties to NSText… properties.
So if you’ve upgraded to iOS6, you’re in clover; just switch from UITextAlignmentCenter to NSTextAlig...