大约有 43,000 项符合查询结果（耗时：0.0280秒） [XML]
How can I read large text files in Python, line by line, without loading it into memory?
...in sensible sized chunks (kilobytes to megabytes say) and split on newline characters ( or whatever the line ending char is on your platform)
– John La Rooy
Jun 25 '11 at 2:36
4
...
How to discard local commits in Git?
... worked. Discarded all local commits and reset to HEAD. Whats the use of ^ char?
– karim
Nov 22 '19 at 13:58
@karim th...
Select count(*) from multiple tables
How can I select count(*) from two different tables (call them tab1 and tab2 ) having as result:
18 Answers
...
how to use ng-option to set default value of select element
I've seen the documentation of the Angular select directive here: http://docs.angularjs.org/api/ng.directive:select .
I can't figure how to set the default value. This is confusing:
...
How do I remove an item from a stl vector with a certain value?
..., my visual studio takes std::remove with only one argument; that is const char *_Filename. What method do I need to call?
– Victor
Aug 24 '13 at 12:28
15
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How to find third or nth maximum salary from salary table?
...you want a single) or DENSE_RANK(for all related rows):
WITH CTE AS
(
SELECT EmpID, EmpName, EmpSalary,
RN = ROW_NUMBER() OVER (ORDER BY EmpSalary DESC)
FROM dbo.Salary
)
SELECT EmpID, EmpName, EmpSalary
FROM CTE
WHERE RN = @NthRow
...
What is the difference D3 datum vs. data?
...rs here on SO are not complete as they only cover the case when you invoke selection.data and selection.datum with an input data parameter. Even in that scenario, the two behave differently if the selection is a single element versus when it contains multiple elements. Moreover, both of these method...
Python string class like StringBuilder in C#?
... you would do the formatting separately.
For insertion and deletion at a character level, you would keep a list of length-one strings. (To make this from a string, you'd call list(your_string). You could also use a UserString.MutableString for this.
(c)StringIO.StringIO is useful for things that w...
Detect the specific iPhone/iPod touch model [duplicate]
...size_t size;
sysctlbyname("hw.machine", NULL, &size, NULL, 0);
char *model = malloc(size);
sysctlbyname("hw.machine", model, &size, NULL, 0);
NSString *sDeviceModel = [NSString stringWithCString:model encoding:NSUTF8StringEncoding];
free(model); ...
How to select/get drop down option in Selenium 2
...converting my selenium 1 code to selenium 2 and can't find any easy way to select a label in a drop down menu or get the selected value of a drop down. Do you know how to do that in Selenium 2?
...