大约有 40,000 项符合查询结果（耗时：0.0669秒） [XML]
Big O, how do you calculate/approximate it?
...you have this piece of code:
int sum(int* data, int N) {
int result = 0; // 1
for (int i = 0; i < N; i++) { // 2
result += data[i]; // 3
}
return result; // 4
}
This function returns the sum of all the elements of the array, and we ...
virtualenv --no-site-packages and pip still finding global packages?
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108
I had a problem like this, until I realized that (long before I had discovered virtualenv), I ...
What is the equivalent of “none” in django templates?
...|
edited Feb 25 '14 at 22:03
Thomas Vander Stichele
33.1k1212 gold badges5050 silver badges5858 bronze badges
...
Extracting numbers from vectors of strings
...inding a set of numbers in the start and capturing them
as.numeric(gsub("([0-9]+).*$", "\\1", years))
or
# pattern is to just remove _years_old
as.numeric(gsub(" years old", "", years))
or
# split by space, get the element in first index
as.numeric(sapply(strsplit(years, " "), "[[", 1))
...
Android requires compiler compliance level 5.0 or 6.0. Found '1.7' instead. Please use Android Tools
...clipse IDE).
As helios said, you must set project compatibility to Java 5.0 or Java 6.0.
To do that, 2 options:
Right-click on your project and select "Android Tools -> Fix
Project Properties" (if this din't work, try second option)
Right-click on your project and select "Properties -> Ja...
Javascript: How to check if a string is empty? [duplicate]
...
150
I check length.
if (str.length == 0) {
}
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Rails: What's a good way to validate links (URLs)?
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Simone CarlettiSimone Carletti
160k3939 gold badges336336 silver badges353353 bronze badges
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How to read a line from the console in C?
... read. So you use fgetc:
char * getline(void) {
char * line = malloc(100), * linep = line;
size_t lenmax = 100, len = lenmax;
int c;
if(line == NULL)
return NULL;
for(;;) {
c = fgetc(stdin);
if(c == EOF)
break;
if(--len == 0) {
...
pinterest api documentation [closed]
Update Aug 2015: Pinterest provides it here now https://dev.pinterest.com/
10 Answers
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