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How do I know the script file name in a Bash script?
...ink "$0" || echo "$0")")"
IMO, that'll produce confusing output. "I ran foo.sh, but it's saying I'm running bar.sh!? Must be a bug!" Besides, one of the purposes of having differently-named symlinks is to provide different functionality based on the name it's called as (think gzip and gunzip o...
Parse a .py file, read the AST, modify it, then write back the modified source code
...at would enable you do do so.
eg.
import ast
import codegen
expr="""
def foo():
print("hello world")
"""
p=ast.parse(expr)
p.body[0].body = [ ast.parse("return 42").body[0] ] # Replace function body with "return 42"
print(codegen.to_source(p))
This will print:
def foo():
return 42
No...
Determine the type of an object?
...bbler, That may be, though I haven't yet ran into the situation where type(foo) is SomeType would be better than isinstance(foo, SomeType).
– Mike Graham
Feb 9 '10 at 16:45
5
...
AngularJS with Django - Conflicting template tags
... any way to also update the $interpolateProvider for raw output? e.g. {{{foo}}} becoming {{[{foo}]}} ?
– tester
Aug 26 '13 at 7:05
|
show ...
Java: Instanceof and Generics
...e) {
//...
You are casting the object to T (your generic type), just to fool the compiler. Your cast does nothing at runtime, but you will still get a ClassCastException when you try to pass the wrong type of object into your abstract method.
NOTE 1: If you are doing additional unchecked casts i...
How to split long commands over multiple lines in PowerShell
...
If you have a function:
$function:foo | % Invoke @(
'bar'
'directory'
$true
)
If you have a cmdlet:
[PSCustomObject] @{
Path = 'bar'
Type = 'directory'
Force = $true
} | New-Item
If you have an application:
{foo.exe @Args} | % Invoke @(
...
Do I cast the result of malloc?
...ints are also trivial, if you use the variable in your malloc call: char **foo = malloc(3*sizeof(*foo)); if quite full-proof: 3 pointers to char pointers. then loop, and do foo[i] = calloc(101, sizeof(*(foo[i])));. Allocate array of 101 chars, neatly initialized to zeroes. No cast needed. change the...
Detecting an “invalid date” Date instance in JavaScript
...
Instead of using new Date() you should use:
var timestamp = Date.parse('foo');
if (isNaN(timestamp) == false) {
var d = new Date(timestamp);
}
Date.parse() returns a timestamp, an integer representing the number of milliseconds since 01/Jan/1970. It will return NaN if it cannot parse the su...
Can I do a partial revert in GIT
... I wanted to revert only part of a commit, so I did: (1) git show ... > foo.txt (2) edit foo.txt to remove the diffs I wanted not to revert (3) git apply --reverse foo.txt to revert the diffs still listed in foo.txt.
– cxw
Mar 19 '18 at 17:49
...
Viewing all defined variables [duplicate]
...th the modulo character unless the automagic feature is enabled):
In [1]: foo = 'bar'
In [2]: %who
foo
You can use the whos magic to get more detail:
In [3]: %whos
Variable Type Data/Info
----------------------------
foo str bar
There are a wealth of other magics available. IPy...