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Using std Namespace
...dant lookup (aka ADL or Koenig lookup):
template< typename T >
void foo( T& x, T& y)
{
using std::swap; // makes std::swap available in this function
// do stuff...
swap( x, y); // will use a T-specific swap() if it exists,
// otherw...
Is it possible only to declare a variable without assigning any value in Python?
...ually going to assign to or use them. I think what you want to do is just
foo = None
which will assign the value None to the variable foo.
EDIT: What you really seem to want to do is just this:
#note how I don't do *anything* with value here
#we can just start using it right inside the loop
fo...
How to test if string exists in file with Bash?
...string matches an entire line, not just a part of it: so if you search for foo, only lines containing exactly foo are matched, not foobar. (There was an error in my examples; it still used some regex syntax. Fixed now.)
– Thomas
Jan 24 '11 at 17:04
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How to go to each directory and execute a command?
...ommands don't actually care in which directory you execute them. for f in foo bar; do cat "$f"/*.txt; done >output is functionally equivalent to cat foo/*.txt bar/*.txt >output. However, ls is one command that does produce slightly different output depending on how you pass it arguments; sim...
How to get “their” changes in the middle of conflicting Git rebase?
...
You want to use:
git checkout --ours foo/bar.java
git add foo/bar.java
If you rebase a branch feature_x against master (i.e. running git rebase master while on branch feature_x), during rebasing ours refers to master and theirs to feature_x.
As pointed out in...
twig: IF with multiple conditions
... to wrap individual expressions in parentheses to avoid confusion:
{% if (foo and bar) or (fizz and (foo + bar == 3)) %}
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How to convert a byte array to a hex string in Java?
...st this type of work.
import org.apache.commons.codec.binary.Hex;
String foo = "I am a string";
byte[] bytes = foo.getBytes();
System.out.println( Hex.encodeHexString( bytes ) );
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Why do you need to put #!/bin/bash at the beginning of a script file?
...n question when you try to execute it. So, if you try to run a file called foo.sh which has #!/bin/bash at the top, the actual command that runs is /bin/bash foo.sh. This is a flexible way of using different interpreters for different programs. This is something implemented at the system level and t...
Benefits of using the conditional ?: (ternary) operator
...
A really cool usage is:
x = foo ? 1 :
bar ? 2 :
baz ? 3 :
4;
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Rails Console: reload! not reflecting changes in model files? What could be possible reason?
... method on an object. Eg, if you change the definition of the class method foo(), then in the console a.foo will not use the new definition unless you first reload a.
– jpw
Jun 12 '13 at 0:29
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