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Linux command to print directory structure in the form of a tree
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Beware of the newline character at the end of the first line if copying this directly
– Rahul
Aug 5 '16 at 16:46
2
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Two way/reverse map [duplicate]
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Got some extra brackets in there: reverse_map = dict(reversed(item) for item in forward_map.items())
– Andriy Drozdyuk
Dec 12 '11 at 17:30
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与复制构造函数相关的错误.例如:0x77D9FCAA (ntdll.dll) (prog31.exe 中)处...
...含指针成员，没有复制构造函数出错
struct Node
{
Node(char *n="",int a = 0)
{
name = strdup(n);
strcpy(name,n);
age = a ;
}
~Node()
{
delete[] name;
}
char *name;
int age;
};
int main()
{
Node node1("Roger",20),node2(node1);
//pri...
convert a list of objects from one type to another using lambda expression
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List<char> c = new List<char>() { 'A', 'B', 'C' };
List<string> s = c.Select(x => x.ToString()).ToList();
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How to change the output color of echo in Linux
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It may be more convenient to insert tput's output directly into your echo strings using command substitution:
echo "$(tput setaf 1)Red text $(tput setab 7)and white background$(tput sgr 0)"
Example
The above command produces this on Ubuntu:
Foreground & background colour commands
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Is there an expression for an infinite generator?
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knowing the syntax of iter (here with extra sentinel) and the syntax of lambda (here without any passed parameters, just return 0), the only place to hate is that enigmatic g1.
– Sławomir Lenart
Mar 11 '19 at 17:56
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Append a dictionary to a dictionary [duplicate]
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You can do
orig.update(extra)
or, if you don't want orig to be modified, make a copy first:
dest = dict(orig) # or orig.copy()
dest.update(extra)
Note that if extra and orig have overlapping keys, the final value will be taken from extra. For...
How to split a sequence into two pieces by predicate?
...like this (modify if you need to search for ints)
def split(list_in: List[String], search: String): List[List[String]] = {
def split_helper(accum: List[List[String]], list_in2: List[String], search: String): List[List[String]] = {
val (h1, h2) = list_in2.span({x: String => x!= search})
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Compare two folders which has many files inside contents
...trailing blanks (spaces and tabs)
and treats other strings of blanks as
equivalent.
-i Ignores the case of letters. For example,
`A' will compare equal to `a'.
-t Expands <TAB> characters in output ...
Setting the selected value on a Django forms.ChoiceField
...ee_id})
Alternatively the initial argument can be ignored in place of an extra line with:
form.fields['manager'].initial = manager_employee_id
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