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How to pass boolean values to a PowerShell script from a command prompt
...arameter is used. In particular, the $false argument is being treated as a string value, in a similar way to the example below:
PS> function f( [bool]$b ) { $b }; f -b '$false'
f : Cannot process argument transformation on parameter 'b'. Cannot convert value
"System.String" to type "System.Bool...
Convert Iterator to ArrayList
...
You can copy an iterator to a new list like this:
Iterator<String> iter = list.iterator();
List<String> copy = new ArrayList<String>();
while (iter.hasNext())
copy.add(iter.next());
That's assuming that the list contains strings. There really isn't a faster way t...
How do you reverse a string in place in JavaScript?
How do you reverse a string in place (or in-place) in JavaScript when it is passed to a function with a return statement, without using built-in functions ( .reverse() , .charAt() etc.)?
...
Using str_replace so that it only acts on the first match?
...] - The maximum possible
replacements for each pattern in each
subject string. Defaults to -1 (no
limit).
Though, see zombat's answer for a more efficient method (roughly, 3-4x faster).
share
|
...
The simplest way to comma-delimit a list?
...
Java 8 and later
Using StringJoiner class :
StringJoiner joiner = new StringJoiner(",");
for (Item item : list) {
joiner.add(item.toString());
}
return joiner.toString();
Using Stream, and Collectors:
return list.stream().
map(Object...
C++虚继承的概念 - C/C++ - 清泛网 - 专注C/C++及内核技术
..." << endl;}
34: private:
35: };
36:
37: int main(int argc, char* argv[])
38: {
39: Child c;
40:
41: //不能这样使用，会产生二意性，VC下error C2385
42: //c.print();
43:
44: //只能这样使用
45: c.Base::print();
46: c.Sub::print...
How to fix “Incorrect string value” errors?
...r noticing an application tended to discard random emails due to incorrect string value errors, I went though and switched many text columns to use the utf8 column charset and the default column collate ( utf8_general_ci ) so that it would accept them. This fixed most of the errors, and made the ...
SQL keys, MUL vs PRI vs UNI
...------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+---------+------+-----+---------+-------+
| foo | int(11) | YES | | NULL | |
+-------+---------+------+-----+---------+-------+
1 row in set (0.00 sec)
A table with one column and an index o...
When to use static classes in C# [duplicate]
...ery cheap operation in most languages, so speed is not an issue. Adding an extra line of code to the consumer is a low cost for laying the foundation of a much more maintainable solution in the future. And finally, if you want to avoid creating instances, simply create a singleton wrapper of your cl...
What is the 'new' keyword in JavaScript?
...e) {
this.name = name;
}
var john = new Person('John');
However the extra benefit that ECMAScript has is you can extend with the .prototype property, so we can do something like...
Person.prototype.getName = function() { return this.name; }
All objects created from this constructor will no...