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What is the difference between javac and the Eclipse compiler?
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Eclipse's built-in compiler is based on IBM's Jikes java compiler. (Note that Eclipse also started its life at IBM). It is completely independent of Sun's Java compiler in the JDK; it is not a wrapper around Sun's javac.
Jikes has existed for a long time,...
When do you use POST and when do you use GET?
... a file as input, does some processing on the file (example - extract data based on regex) and returns JSON data, then can I use GET request to upload a file to the server. Or should I use POST request?
– variable
Dec 5 '19 at 11:24
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Is there a way to 'uniq' by column?
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To consider multiple column.
Sort and give unique list based on column 1 and column 3:
sort -u -t : -k 1,1 -k 3,3 test.txt
-t : colon is separator
-k 1,1 -k 3,3 based on column 1 and column 3
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Managing CSS Explosion
...oney well spent). There are free ones around as well (e.g. Code Beautifier based on CSS Tidy, an open-source tool).
Build sensible classes. See below for a few notes on this.
Use semantics, avoid DIV soup - use <ul>s for menus, for example.
Define everything on as low a level as possible (e.g...
Pythonic way to check if a file exists? [duplicate]
...t. If it does exists, it will print "Ooops" and return None (untested, and based solely on reading the python documentation, so might not be 100% correct).
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How to set selected item of Spinner by value, not by position?
I have a update view, where I need to preselect the value stored in database for a Spinner.
25 Answers
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Why there is no ConcurrentHashSet against ConcurrentHashMap
HashSet is based on HashMap.
9 Answers
9
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Change select box option background color
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I don't know if you've considered it or not but if your application is based on coloring various groupings of items you should probably use the <optgroup> tag coupled with a class for further referencing. For example:
<select>
<optgroup label="Numbers" class="green">
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Get the last inserted row ID (with SQL statement) [duplicate]
... row (similar to behavior of an update statement that updates a single row based on input of multiple joined rows).
– BVernon
Jan 6 '19 at 22:56
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AWK: Access captured group from line pattern
...is something I need all the time so I created a bash function for it. It's based on glenn jackman's answer.
Definition
Add this to your .bash_profile etc.
function regex { gawk 'match($0,/'$1'/, ary) {print ary['${2:-'0'}']}'; }
Usage
Capture regex for each line in file
$ cat filename | regex...