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How does push notification technology work on Android?
...otification message to Google GCM servers. It is a service Google provides free of charge and any such third-party has to implement a communication channel with Google servers using their GCN protocol. By the way, the protocol is pretty much just a JSON-formatted HTTP response. See developers.google...
git still shows files as modified after adding to .gitignore
...uld use .idea/ instead of .idea/* to ignore a directory. You can find more info about the patterns on the .gitignore man page.
Helpful quote from the git-rm man page
--cached
Use this option to unstage and remove paths only from the index.
Working tree files, whether modified or not, wi...
How does MySQL process ORDER BY and LIMIT in a query?
... result set must be ordered before the LIMIT is applied or the the DBMS is free to arbitrarily order the result and then OFFSET and LIMIT on that set. I've read that this may be due to the DBMS selecting an alternate Query Plan based on OFFSET and LIMIT thus the arbitrary order.
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Efficiently test if a port is open on Linux?
...on the port (445 in this example) or it will output nothing if the port is free.
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git mv and only change case of directory
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(git mv-free variant.)
I ran into this problem in Git on Mac OS X 10.9. I solved it as follows:
git rm -r --cached /path/to/directory
That stages the directory for deletion in Git but does not actually remove any physical files (-...
Cocoa Autolayout: content hugging vs content compression resistance priority
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@fatuhoku can you check again, this video is free
– onmyway133
Jun 26 '14 at 14:58
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Is it possible to Pivot data using LINQ?
...guration cannot be hardcoded I've written special PivotData library (it is free):
var pvtData = new PivotData(new []{"CustID","OrderDate"}, new SumAggregatorFactory("Qty"));
pvtData.ProcessData(s, (o, f) => {
var custData = (TT)o;
switch (f) {
case "CustID": return custData.CustI...
Getting a slice of keys from a map
... edited Sep 28 '17 at 4:19
Freedom_Ben
8,59888 gold badges4949 silver badges8080 bronze badges
answered Jan 8 '15 at 19:36
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Using a bitmask in C#
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Seems like all this info has already been provided above. If you are giving any new info you should mark it clearly.
– sonyisda1
Sep 18 '19 at 21:05
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How do you change the size of figures drawn with matplotlib?
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"_tkinter.TclError: not enough free memory for image buffer"
– Cerin
Mar 30 '17 at 0:16
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