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Convert xlsx to csv in Linux with command line
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The Gnumeric spreadsheet application comes with a command line utility called ssconvert that can convert between a variety of spreadsheet formats:
$ ssconvert Book1.xlsx newfile.csv
Using exporter Gnumeric_stf:stf_csv
$ cat newfile.csv
Foo,Bar,Baz
1,2,3
123.6,7.89,
2012/05/14,,
The,last,Line
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Why (0-6) is -6 = False? [duplicate]
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It is happening because CPython caches some small integers and small strings and gives every instance of that object a same id().
(0-5) and -5 has same value for id(), which is not true for 0-6 and -6
>>> id((0-6))
12064324
>>> id((-6))
12064276
>>> id((0-5))
10022...
filter items in a python dictionary where keys contain a specific string
...ct comprehension:
filtered_dict = {k:v for k,v in d.iteritems() if filter_string in k}
One you see it, it should be self-explanatory, as it reads like English pretty well.
This syntax requires Python 2.7 or greater.
In Python 3, there is only dict.items(), not iteritems() so you would use:
fil...
How to extract the file name from URI returned from Intent.ACTION_GET_CONTENT?
...on to just extract the file name (assuming "this" is an Activity):
public String getFileName(Uri uri) {
String result = null;
if (uri.getScheme().equals("content")) {
Cursor cursor = getContentResolver().query(uri, null, null, null, null);
try {
if (cursor != null && curso...
JPA eager fetch does not join
... @JoinColumn(name="messageId")
private Message message;
private String governmentId;
public MessageRecipientId() {
}
public Message getMessage() {
return message;
}
public void setMessage(Message message) {
this.message = message;
}
public S...
How to establish a connection pool in JDBC?
... Object, reducing the Garbage collection load.
« Pooling [ Object pool, String Constant Pool, Thread Pool, Connection pool]
String Constant pool
String literal pool maintains only one copy of each distinct string value. which must be immutable.
When the intern method is invoked, it check objec...
Build tree array from flat array in javascript
I have a complex json file that I have to handle with javascript to make it hierarchical, in order to later build a tree.
Every entry of the json has :
id : a unique id,
parentId : the id of the parent node (which is 0 if the node is a root of the tree)
level : the level of depth in the tree
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twitter bootstrap typeahead ajax example
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As in the Typeahead fork, data must be a JSON array of strings and the content type must be application/json.
– Stijn Van Bael
Sep 4 '12 at 20:00
9
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How to check for file existence [duplicate]
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Check out Pathname and in particular Pathname#exist?.
File and its FileTest module are perhaps simpler/more direct, but I find Pathname a nicer interface in general.
s...
Setting CSS pseudo-class rules from JavaScript
...A function to cope with the cross-browser stuff:
addCssRule = function(/* string */ selector, /* string */ rule) {
if (document.styleSheets) {
if (!document.styleSheets.length) {
var head = document.getElementsByTagName('head')[0];
head.appendChild(bc.createEl('style'));
}
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