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How to check whether a file is empty or not?
...s, just for fun.
>>> import os
>>> os.stat('c:/pagefile.sys').st_size==0
False
False means a non-empty file.
So let's write a function:
import os
def file_is_empty(path):
return os.stat(path).st_size==0
...
How do I format a number in Java?
...
When you want to convert the rounded value as string, this is one of the way. Other is using DecimalFormat. And DecimalFormat is slightly faster than String.format. Simple System.currentTimeMillis diff reveals that.
– ma...
Can you get the column names from a SqlDataReader?
...numerable<dynamic>> and .Cast<dynamic>, but it says, Cannot convert method group 'Cast' to non-delegate type 'dynamic'. Did you intend to invoke the method? what did I do wrong there? (I looked at your sources, but they required you to know the column name, which I don't)
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Detecting WPF Validation Errors
...ding Path=(validationScope:Scope.HasErrors),
Converter={local:BoolToBrushConverter},
ElementName=Form}"
BorderThickness="1">
<StackPanel x:Name="Form" validationScope:Scope.ForInputTypes="{x:Static validationScope:InputTyp...
Hash String via SHA-256 in Java
... Calling ´toString´ on a byte array is producing a different result than converting the content of the byte array to String, Brendan Longs answer is more appropriate
– max.mustermann
Feb 4 '15 at 10:15
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Why is address zero used for the null pointer?
... differently at runtime. The C++ standard has a note that makes clear that converting "an integral constant expression with value zero always yields a null pointer, but converting other expressions that happen to have value zero need not yield a null pointer".
a negative value might be just as usabl...
Extracting text OpenCV
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Here is an alternative approach that I used to detect the text blocks:
Converted the image to grayscale
Applied threshold (simple binary threshold, with a handpicked value of 150 as the threshold value)
Applied dilation to thicken lines in image, leading to more compact objects and less white sp...
Python set to list
How can I convert a set to a list in Python? Using
7 Answers
7
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Remove HTML tags from a String
...static void main(String[] args) {
try {
// the HTML to convert
FileReader in = new FileReader("java-new.html");
Html2Text parser = new Html2Text();
parser.parse(in);
in.close();
System.out.println(parser.getText());
...
PHP & mySQL: Year 2038 Bug: What is it? How to solve it?
...y platform yet.
Here is a process for altering a database table column to convert TIMESTAMP to DATETIME. It starts with creating a temporary column:
# rename the old TIMESTAMP field
ALTER TABLE `myTable` CHANGE `myTimestamp` `temp_myTimestamp` int(11) NOT NULL;
# create a new DATETIME column of ...