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Removing multiple keys from a dictionary safely
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Why not like this:
entries = ('a', 'b', 'c')
the_dict = {'b': 'foo'}
def entries_to_remove(entries, the_dict):
for key in entries:
if key in the_dict:
del the_dict[key]
A more compact version was provided by mattbornski using dict.pop()
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How to list npm user-installed packages?
How do I list the user-installed package ONLY in npm ? When I do npm -g list it outputs every package and their dependencies, which is not what I want.
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Cannot change version of project facet Dynamic Web Module to 3.0?
...so I changed the library in Java Build Path to obtain the JavaSE-1.7. It's all OK up to here.
31 Answers
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Can you provide some examples of why it is hard to parse XML and HTML with a regex? [closed]
...> < -->
&e link </a>
</body>
Not to mention all the browser-specific parsing for invalid constructs.
Good luck pitting regex against that!
EDIT (Jörg W Mittag): Here is another nice piece of well-formed, valid HTML 4.01:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4...
How to tell Jackson to ignore a field during serialization if its value is null?
... It's deprecated but if you need to maintain old stuff this answer is totally fine! so thanks @WTK :)
– DominikAngerer
Jan 21 '15 at 10:33
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Should a return statement be inside or outside a lock?
...als init (
[0] int32 CS$1$0000,
[1] object CS$2$0001)
L_0000: ldsfld object Program::sync
L_0005: dup
L_0006: stloc.1
L_0007: call void [mscorlib]System.Threading.Monitor::Enter(object)
L_000c: call int32 Program::GetValue()
L_0011: stloc.0
L_0012: leav...
Mimicking sets in JavaScript?
...the list is a little safer with this:
if (Object.prototype.hasOwnProperty.call(obj, A))
// put code here
}
because of potential conflict between built-in methods and/or properties on the base Object like the constructor property.
Sidebar on ES6: The current working version of ECMAScript 6 or s...
Is it safe to delete a NULL pointer?
...ter delete. Setting a pointer to NULL after deleting it masquerades memory allocation errors, which is a very bad thing. A program that is correct does not delete a pointer twice, and a program that does delete a pointer twice should crash.
– Damon
Aug 30 '13 a...
What is compiler, linker, loader?
...'space', 'tab' and 'new line'.
Therefore this unit of compilation is also called "TOKENIZER". It also removes
the comments, generates symbol table and relocation table entries.
2) Syntactic Analyzer:
This unit check for the syntax in the code. For ex:
{
int a;
int b;
int c;
int d...
Get integer value from string in swift
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Instead of putting ! on the call, you can declare your variable as optional: someNumb: Int? = stringNumber.toInt(). Then the type safety system will be aware that foo may not exist. Putting ! will of course crash if your string can't convert to a number....