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Get Image size WITHOUT loading image into memory
...
As the comments allude, PIL does not load the image into memory when calling .open. Looking at the docs of PIL 1.1.7, the docstring for .open says:
def open(fp, mode="r"):
"Open an image file, without loading the raster data"
There are a few file operations in the sourc...
PreparedStatement with list of parameters in a IN clause [duplicate]
...t possibleValues = ...
StringBuilder builder = new StringBuilder();
for( int i = 0 ; i < possibleValue.size(); i++ ) {
builder.append("?,");
}
String stmt = "select * from test where field in ("
+ builder.deleteCharAt( builder.length() -1 ).toString() + ")";
PreparedStateme...
各编程语言读写文件汇总 - C/C++ - 清泛网 - 专注C/C++及内核技术
...一种：fgets、fputs简单读写，一般用于处理文本文件。
int main(int argc, char* argv[])
{
FILE *fp = NULL;
/*打开文件*/
if((fp = fopen("test.txt", "w+")) == NULL)
{
printf("文件打开出错，请检查文件是否存在！\n");
return -1;
}
else
{
pri...
How do I decode a string with escaped unicode?
...scaped string. First the string was escaped, then encoded with unicode. To convert back to normal:
var x = "http\\u00253A\\u00252F\\u00252Fexample.com";
var r = /\\u([\d\w]{4})/gi;
x = x.replace(r, function (match, grp) {
return String.fromCharCode(parseInt(grp, 16)); } );
console.log(x); // ...
Difference between Mutable objects and Immutable objects [duplicate]
...For example a simple Comparator Implementation).
class Mutable{
private int value;
public Mutable(int value) {
this.value = value;
}
//getter and setter for value
}
class Immutable {
private final int value;
public Immutable(int value) {
this.value = value;
}
//only g...
How can I force Powershell to return an array when a call only returns one object?
...rray to an Azure deployment template. If there was one object, PowerShell "converted" it to a string. In the example below, $a is returned from a function that gets VM objected according to the value of a tag. I pass the $a to the New-AzureRmResourceGroupDeployment cmdlet by wrapping it in @(). Like...
Check substring exists in a string in C
...rstr(sent, word) != NULL) {
/* ... */
}
Note that strstr returns a pointer to the start of the word in sent if the word word is found.
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What does “while True” mean in Python?
...the while statement is going to be evaluated as a boolean. Meaning it gets converted into either true or false.
Consider in the statement while(6 > 5)
It first evaluates the expression 6 > 5 which is true so is the same as saying while(true)
Anything that is not FALSE, 0, an emptry string ...
SQL query to select dates between two dates
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Tried this today, you could also use convert(date, Date) between '2011/02/25' and '2011/02/27' (at least with a recent MS SQL Server). The convert() part will take care of stripping the time part and the between comparison will then work as expected.
...
How to turn on (literally) ALL of GCC's warnings?
...n which is only relevant on CPUs with a 32-bit single-precision floating-point unit which implements float in hardware, but emulates double in software. Doing calculations as double would use the software emulation and be slower. That's relevant for some embedded CPUs, but completely irrelevant fo...