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Different types of thread-safe Sets in Java
... like for HashMap/HashSet. There is a limited concurrency for writing (the table is partitioned, and write access will be synchronized on the needed partition), while read access is fully concurrent to itself and the writing threads (but might not yet see the results of the changes currently being w...
Logging levels - Logback - rule-of-thumb to assign log levels
... at WARN actually get logged on my deployment configured with ERROR?" The table says, NO.
"Will a logging code line that logs at WARN actually get logged on my deployment configured with DEBUG?" The table says, YES.
from logback documentation:
In a more graphic way, here is how the selection...
Dynamically select data frame columns using $ and a character value
...ldname)) {
print("Bad file column name")
}
# Here we use the hash table implementation where
# we have a string key and list value so we need actual strings,
# not Factors
file[cptcodefieldname] = as.character(file[cptcodefieldname])
file[icdcodefieldname] = as.character(file[icdcodefieldn...
How do I check to see if a value is an integer in MySQL?
... matching the string to a regular expression. Simply do
select field from table where field REGEXP '^-?[0-9]+$';
this is reasonably fast. If your field is numeric, just test for
ceil(field) = field
instead.
share
...
Sql Server equivalent of a COUNTIF aggregate function
...ver 2012) without changing the 'count' to a 'sum' and the same logic is portable to other 'conditional aggregates'. E.g., summing based on a condition:
SELECT SUM(CASE WHEN myColumn=1 THEN AD_CurrentView.NumberColumn ELSE 0 END)
FROM AD_CurrentView
...
How can I escape a double quote inside double quotes?
..." sometimes
In your example, I would do it something like this:
$ dbtable=example
$ dbload='load data local infile "'"'gfpoint.csv'"'" into '"table $dbtable FIELDS TERMINATED BY ',' ENCLOSED BY '"'"'"' LINES "'TERMINATED BY "'"'\n'"'" IGNORE 1 LINES'
$ echo $dbload
which produces the follow...
Converting HTML files to PDF [closed]
...exisiting (X)HTML-document. The input files (reports) use a rather simple, table-based layout, so support for really fancy JavaScript/CSS stuff is probably not needed.
...
Hidden features of Android development?
...us requests for an action to be completed (Eg. The Where app can request a table booking from the Open Table app).
They can request an unknown application to complete an action without needing to know which application(s) can fulfill that request
Your app can fulfill requests from unknown apps to...
How to print HTML content on click of a button, but not the page? [duplicate]
...
I came across another elegant solution for this:
Place your printable part inside a div with an id like this:
<div id="printableArea">
<h1>Print me</h1>
</div>
<input type="button" onclick="printDiv('printableArea')" value="print a div!" />
Now let'...
How to get next/previous record in MySQL?
...ded the results ordered by date since I can't rely on the ID field as a sortable column. Here's the solution I came up with.
First we find out the index of the desired record in the table, when it's sorted as we want:
SELECT row
FROM
(SELECT @rownum:=@rownum+1 row, a.*
FROM articles a, (SELECT @...