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CFLAGS vs CPPFLAGS
...xpands the variables. As both CPPFLAGS and CFLAGS are used in the compiler call, which you use to define include paths is a matter of personal taste. For instance if foo.c is a file in the current directory
make foo.o CPPFLAGS="-I/usr/include"
make foo.o CFLAGS="-I/usr/include"
will both call you...
How to find serial number of Android device?
I need to use a unique ID for an Android app and I thought the serial number for the device would be a good candidate. How do I retrieve the serial number of an Android device in my app ?
...
'id' is a bad variable name in Python
Why is it bad to name a variable id in Python?
9 Answers
9
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Notification click: activity already open
... example, consider a task consisting of the activities: A, B, C, D.
If D calls startActivity() with an Intent that resolves to the
component of activity B, then C and D will be finished and B receive
the given Intent, resulting in the stack now being: A, B.
The currently running instance...
Export from sqlite to csv using shell script
...
sqlite3
You have a separate call to sqlite3 for each line; by the time your select runs, your .out out.csv has been forgotten.
Try:
#!/bin/bash
./bin/sqlite3 ./sys/xserve_sqlite.db <<!
.headers on
.mode csv
.output out.csv
select * from eS1100_sen...
Scatter plot and Color mapping in Python
..., c=t, cmap=cm.cmap_name)
Importing matplotlib.cm is optional as you can call colormaps as cmap="cmap_name" just as well. There is a reference page of colormaps showing what each looks like. Also know that you can reverse a colormap by simply calling it as cmap_name_r. So either
plt.scatter(x,...
What are the disadvantages of using persistent connection in PDO
...efore reuse. For example, open and unfinished transactions are not automatically rolled back. But also, authorization changes which happened in the time between putting the connection into the pool and reusing it are not reflected. This may be seen as an unwanted side-effect. On the contrary, the na...
Error: Jump to case label
... // ...
lx:
goto ly; // OK, jump implies destructor
// call for a followed by construction
// again immediately following label ly
}
— end example ]
As of GCC 5.2, the error message now says:
crosses initialization of
C
C allows it: c99 goto past i...
Remove duplicate rows in MySQL
...de the IGNORE keyword. Like so:
ALTER IGNORE TABLE jobs
ADD UNIQUE INDEX idx_name (site_id, title, company);
This will drop all the duplicate rows. As an added benefit, future INSERTs that are duplicates will error out. As always, you may want to take a backup before running something like thi...
How to make the first option of selected with jQuery
...element that may not reset properly in a form that has had the reset event called.
Use jQuery's prop method to clear and set the option needed:
$("#target option:selected").prop("selected", false);
$("#target option:first").prop("selected", "selected");
...