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Subqueries vs joins
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A "correlated subquery" (i.e., one in which the where condition depends on values obtained from the rows of the containing query) will execute once for each row. A non-correlated subquery (one in which the where condition is independent of the containing q...
Round a double to 2 decimal places [duplicate]
...o, use this instead
(Adapted from this answer by Louis Wasserman and this one by Sean Owen.)
public static double round(double value, int places) {
if (places < 0) throw new IllegalArgumentException();
BigDecimal bd = BigDecimal.valueOf(value);
bd = bd.setScale(places, RoundingMode...
Why isn't SQL ANSI-92 standard better adopted over ANSI-89?
...rence in optimization or performance of SQL-89 versus SQL-92 style joins. One can assume that most RDBMS engines transform the syntax into an internal representation before optimizing or executing the query, so the human-readable syntax makes no difference.
I also try to evangelize the SQL-92 synt...
How can I get this ASP.NET MVC SelectList to work?
...pDown", ViewBag.PageOptions as IEnumerable<SelectListItem>, "(Select one)")
It will result in the desired output--of course, you can leave out the "(Select one)" optionLabel above if you don't want the first empty item:
<select id="PageOptionsDropDown" name="PageOptionsDropDown">
<...
Access restriction: The type 'Application' is not API (restriction on required library rt.jar)
...n and the comment from Jonathan. In the tab Libraries you have to open the one among the listed "JARs and class folders" to see the "Access rules" belongs to it.
– Laszlo Hirdi
Jan 13 '16 at 16:28
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In Python, when should I use a function instead of a method?
The Zen of Python states that there should only be one way to do things- yet frequently I run into the problem of deciding when to use a function versus when to use a method.
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Convert absolute path into relative path given a current directory using Bash
... # no match, means that candidate common part is not correct
# go up one level (reduce common part)
common_part="$(dirname $common_part)"
# and record that we went back, with correct / handling
if [[ -z $result ]]; then
result=".."
else
result="../$result"
f...
How to have an auto incrementing version number (Visual Studio)? [duplicate]
...vided by 2) [IT IS NOT RANDOM]. So if you built the solution late in a day one day, and early in a day the next day, the later build would have an earlier version number. I recommend always using X.Y.* instead of X.Y.Z.* because your version number will ALWAYS increase this way.
Newer versions of V...
How to read and write excel file
...read and write an Excel file from Java with 3 columns and N rows, printing one string in each cell. Can anyone give me simple code snippet for this? Do I need to use any external lib or does Java have built-in support for it?
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get all keys set in memcached
...d on when they last had activity. If yes, you can change that by selecting one of active/oldest/votes from just below the question text. Other than that, this answer is at the top in incognito mode.
– mu 無
Mar 29 '18 at 4:24
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