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What is a 'Closure'?
...avaScript, Swift, and Ruby) will allow you to keep a reference to a scope (including its parent scopes), even after the block in which those variables were declared has finished executing, provided you keep a reference to that block or function somewhere.
The scope object and all its local variable...
Do try/catch blocks hurt performance when exceptions are not thrown?
...
Well, the IL includes a try/catch block in the same notation as in C#, so this does not really show how much overhead a try/catch means behind the scenes! Just that the IL does not add much more, does not mean the same as it is not added ...
How to copy data from one table to another new table in MySQL?
...ECT st_id,from_uid,now(),'Pending','Assigned'
FROM table1
If you want to include all rows from table1. Otherwise you can add a WHERE statement to the end if you want to add only a subset of table1.
I hope this helps.
shar...
How do I remove/delete a virtualenv?
...es by recursively uninstalling all of them and then delete the venv.
Edit including Isaac Turner commentary
source venv/bin/activate
pip freeze > requirements.txt
pip uninstall -r requirements.txt -y
deactivate
rm -r venv/
...
Go to back directory browsing after opening file in vim
...ct answer and is thus on the top, I'd like to summarize a bit the answers, including the one by @romainl that imho is the correct one.
:Rex[plore]: Return to Explorer (by @romainl) vimdoc.sourceforge
:Explorer: opens the Explorer, same as :E (if not other command starting with E is defined (see st...
How can I print literal curly-brace characters in python string and also use .format on it?
...ered literal text, which is copied unchanged to the output. If you need to include a brace character in the literal text, it can be escaped by doubling: {{ and }}.
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What are App Domains in Facebook Apps?
...llo"&parameter2="world"
the bold part is the Domainname. 80 is rarely included. I post it since many people may wonder if 3000 or some other port is part of the domain if their not staging their app for production yet. Normally you don't specify it since 80 is the default, but if you just want ...
How to get the selected radio button’s value?
...s a simple way to get the value of any input type.
You also do not need to include jQuery path.
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Do I need all three constructors for an Android custom view?
... {
// do additional work
}
The reason is that the parent class might include default attributes in its own constructors that you might be accidentally overriding. For example, this is the constructor for TextView:
public TextView(Context context) {
this(context, null);
}
public TextView(...
How does this code generate the map of India?
...itespace and printing one character at a time.
Less obfuscated version:
#include "stdio.h"
int main (void) {
int a=10, b=0, c=10;
char* bits ="TFy!QJu ROo TNn(ROo)SLq SLq ULo+UHs UJq TNn*RPn/QPbEWS_JSWQAIJO^NBELPeHBFHT}TnALVlBLOFAkHFOuFETpHCStHAUFAgcEAelclcn^r^r\\tZvYxXyT|S~Pn SPm SOn TNn ...