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Difference between __str__ and __repr__?
...oh I don't know, containing just 4 elements]
Not very. Specifically, the strings in a container would find it way too easy to disturb its string representation. In the face of ambiguity, remember, Python resists the temptation to guess. If you want the above behavior when you’re printing a list,...
Testing modules in rspec
...dummy_class = DummyClass.new
@dummy_class.extend(Say)
end
it "get hello string" do
expect(@dummy_class.hello).to eq "hello"
end
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When should we use Observer and Observable?
... }
@Override
public void update() {
System.out.println( "Binary String: "
+ Integer.toBinaryString( subject.getState() ) );
}
}
OctalObserver.java
public class OctalObserver extends Observer{
public OctalObserver(Subject subject){
this.subject = subject;
this.sub...
How do I get currency exchange rates via an API such as Google Finance? [closed]
...
'public static void main(String[] args) { String currencyPair = "USDEUR"; String address = "query.yahooapis.com/v1/public/yql?q=select * from yahoo.finance.xchange where pair in (\"" + currencyPair + "\")&env=store://datatables.org/a...
Automatic HTTPS connection/redirect with node.js/express
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Don't treat urls as strings, use the url module instead.
– arboreal84
Jul 28 '16 at 18:07
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how to listen to N channels? (dynamic select statement)
... true if the channel has not been closed.
ch := chans[chosen]
msg := value.String()
You can experiment with a more fleshed out example here: http://play.golang.org/p/8zwvSk4kjx
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A variable modified inside a while loop is not remembered
...will not be available once the subshell exits.
Instead you can use a here string to re-write the while loop to be in the main shell process; only echo -e $lines will run in a subshell:
while read line
do
if [[ "$line" == "second line" ]]
then
foo=2
echo "Variable \$foo upda...
How to prevent multiple instances of an Activity when it is launched with different Intents
...new App());
if(!IsTaskRoot) {
Intent intent = Intent;
string action = intent.Action;
if(intent.HasCategory(Intent.CategoryLauncher) && action != null && action.Equals(Intent.ActionMain, System.StringComparison.OrdinalIgnoreCase)) {
System.Cons...
string c_str() vs. data()
...
The documentation is correct. Use c_str() if you want a null terminated string.
If the implementers happend to implement data() in terms of c_str() you don't have to worry, still use data() if you don't need the string to be null terminated, in some implementation it may turn out to perform bett...
Converting a List to a comma separated string
Is there a way to take a List and convert it into a comma separated string?
8 Answers
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