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Getting command-line password input in Python
...that nobody can look at the source code and find out your password just by reading it, and nobody can get your password by just staring over your shoulder and reading your password off the screen when you type it in.
– ArtOfWarfare
Jul 2 '14 at 11:38
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Generate an integer that is not among four billion given ones
...nd pass to find of which of the possible numbers in that bucket are used already.
If it means more than 32 bits, but still of bounded size: Do as above, ignoring all input numbers that happen to fall outside the (signed or unsigned; your choice) 32-bit range.
If "integer" means mathematical intege...
How to test if a string is JSON or not?
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Read the second paragraph that starts with "JSON is built on two structures..." @ json.org or 4th and 5th paragraphs of ecma-international.org/publications/files/ECMA-ST/ECMA-404.pdf
– Onur Yıldırım
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How does a Linux/Unix Bash script know its own PID?
...SHPID | cat -
11656 31528
$ echo $$ $BASHPID
11656 11656
$ echo $$ | while read line; do echo $line $$ $BASHPID; done
11656 11656 31497
$ while read line; do echo $line $$ $BASHPID; done <<< $$
11656 11656 11656
sh...
How can I get a resource content from a static context?
I want to read strings from an xml file before I do much of anything else like setText on widgets, so how can I do that without an activity object to call getResources() on?
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What is the best way to give a C# auto-property an initial value?
... DefaultValueAttribute will not impact the generated IL and it will not be read to initialize the property to that value (see DefaultValue attribute is not working with my Auto Property).
Example of attributes that impact the IL are ThreadStaticAttribute, CallerMemberNameAttribute, ...
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Which is faster: multiple single INSERTs or one multiple-row INSERT?
...ment will save you an overhead of 7 per insert statement, which in further reading the text also says:
If you are inserting many rows from the same client at the same time, use INSERT statements with multiple VALUES lists to insert several rows at a time. This is considerably faster (many times ...
Save ArrayList to SharedPreferences
... List into a HashSet or something similar and store it like that. When you read it back, convert it into an ArrayList, sort it if needed and you're good to go.
//Retrieve the values
Set<String> set = myScores.getStringSet("key", null);
//Set the values
Set<String> set = new HashSet<S...
SQL JOIN vs IN performance?
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This Thread is pretty old but still mentioned often. For my personal taste it is a bit incomplete, because there is another way to ask the database with the EXISTS keyword which I found to be faster more often than not.
So if you a...
How do I style a dropdown with only CSS?
...Explorer 9 (and later) and Firefox 34 (and later) is necessary then keep reading...
Solution #2 Truncate the select element to hide the default arrow (demo)
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(Read more here)
Wrap the select element in a div with a fixed width and overflow:hidden.
Then give the select element a width of about 20...