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Merge PDF files
... for reader in map(PdfFileReader, input_streams):
for n in range(reader.getNumPages()):
writer.addPage(reader.getPage(n))
writer.write(output_stream)
finally:
for f in input_streams:
f.close()
if __name__ == '__main__':
if sys.plat...
how to listen to N channels? (dynamic select statement)
...g like this:
cases := make([]reflect.SelectCase, len(chans))
for i, ch := range chans {
cases[i] = reflect.SelectCase{Dir: reflect.SelectRecv, Chan: reflect.ValueOf(ch)}
}
chosen, value, ok := reflect.Select(cases)
// ok will be true if the channel has not been closed.
ch := chans[chosen]
msg :...
Programmatically creating Markdown tables in R with KnitR
... 1,4|
| 5,4| 3,9| 1,7|
UPDATED: if you get raw markdown in a document try setup results = "asis" chunk option.
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f...
Javascript trick for 'paste as plain text` in execCommand
... = window.clipboardData.getData('Text');
document.selection.createRange().pasteHTML(content);
}
});
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How do I write output in same place on the console?
... 'Downloading File FooFile.txt [%d%%]\r'%i,
Demo:
import time
for i in range(100):
time.sleep(0.1)
print 'Downloading File FooFile.txt [%d%%]\r'%i,
Python 3
print('Downloading File FooFile.txt [%d%%]\r'%i, end="")
Demo:
import time
for i in range(100):
time.sleep(0.1)
prin...
Excel Date to String conversion
...
Here is a VBA approach:
Sub change()
toText Sheets(1).Range("A1:F20")
End Sub
Sub toText(target As Range)
Dim cell As Range
For Each cell In target
cell.Value = cell.Text
cell.NumberFormat = "@"
Next cell
End Sub
If you are looking for a solution witho...
Adding git branch on the Bash command prompt
...and substitution, and arithmetic expansion.
Rather than include the raw, unescaped branch name in PS1 when running in two- or
three-argument mode, construct PS1 to reference a variable that holds the branch name.
Because the shells do not recursively expand, this avoids arbitrary cod...
How to show SQL queries run in the Rails console?
... the job and not .to_sql. And .explain still does not provide sql query in raw format which I can run in pg console. But I needed the raw query to explain and analyze. I guess will have to do with explain for now.
– abhishek77in
Jun 5 at 8:20
...
Long vs Integer, long vs int, what to use and when?
...
By default use an int, when holding numbers.
If the range of int is too small, use a long
If the range of long is too small, use BigInteger
If you need to handle your numbers as object (for example when putting them into a Collection, handling null, ...) use Integer/Long inste...
What's the main difference between int.Parse() and Convert.ToInt32
...
int.Parse(string s)
Integer in RANGE > returns integer value
Null value > ArguementNullException
Not in format > FormatException
Value not in RANGE > OverflowException
...