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T-SQL Cast versus Convert
What is the general guidance on when you should use CAST versus CONVERT ? Is there any performance issues related to choosing one versus the other? Is one closer to ANSI-SQL?
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How to convert an object to a byte array in C#
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To convert an object to a byte array:
// Convert an object to a byte array
public static byte[] ObjectToByteArray(Object obj)
{
BinaryFormatter bf = new BinaryFormatter();
using (var ms = new MemoryStream())
{
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How to get the caller's method name in the called method?
...nd debugging locally but not really something you want in your production system.
– robru
Feb 10 '15 at 2:08
@EugeneK...
Returning null as an int permitted with ternary operator but not if statement
...terprets true ? null : 0 as an Integer expression, which can be implicitly converted to int, possibly giving NullPointerException.
For the second case, the expression null is of the special null type see, so the code return null makes type mismatch.
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How to convert String to Long in Kotlin?
So, due to lack of methods like Long.valueOf(String s) I am stuck.
11 Answers
11
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Convert string date to timestamp in Python
How to convert a string in the format "%d/%m/%Y" to timestamp?
14 Answers
14
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How can I randomize the lines in a file using standard tools on Red Hat Linux?
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A one-liner for python:
python -c "import random, sys; lines = open(sys.argv[1]).readlines(); random.shuffle(lines); print ''.join(lines)," myFile
And for printing just a single random line:
python -c "import random, sys; print random.choice(open(sys.argv[1]).readlines())...
How to get a function name as a string?
...ther choice, which is: def wrapper(kwargs): super(ExtendedClass,self).call(sys._getframe().f_code.co_name, kwargs). So, the answer from Albert Vonpupp looks better to me.
– Richard Gomes
Aug 30 '13 at 19:20
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How to make the division of 2 ints produce a float instead of another int?
...and n and d have opposite signs.
This is why 1/2 does not give a float.
Converting just either one to float as in (float)1/2 suffices because 15.17. Multiplicative Operators says:
Binary numeric promotion is performed on the operands
and 5.6.2. Binary Numeric Promotion says:
If eithe...
How to pretty print XML from the command line?
...;/foo><bar value="ipsum" /></root>' |
python -c 'import sys;import xml.dom.minidom;s=sys.stdin.read();print(xml.dom.minidom.parseString(s).toprettyxml())'
saxon-lint
You need saxon-lint:
echo '<root><foo a="b">lorem</foo><bar value="ipsum" /></root&g...