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When to use ' (or quote) in Lisp?
...
The HyperSpec clhs.lisp.se/Body/s_quote.htm says behavior is undefined if the quoted object is destructively modified. It's implied that this is to allow impls to treat the values as atomic values.
– Xanthir
Nov 13 '15 at 20:2...
SQL RANK() versus ROW_NUMBER()
...estTable(
[id] [int] NOT NULL,
[create_date] [date] NOT NULL,
[info1] [varchar](50) NOT NULL,
[info2] [varchar](50) NOT NULL,
)
Insert some data
INSERT INTO dbo.#TestTable (id, create_date, info1, info2)
VALUES (1, '1/1/09', 'Blue', 'Green')
INSERT INTO dbo.#TestTable (id, create_...
I want to execute shell commands from Maven's pom.xml
...nvoking the plugin on the command line would just work:
$ mvn exec:exec
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Building Q3491937
[INFO] task-segment: [exec:exec]
[INFO] ----------------------------------------------...
iPhone Data Usage Tracking/Monitoring
...nterface and pdp_ip0 is your WWAN interface.
There is no good way to get information wifi/cellular network data since, particular date-time!
Data statistic (ifa_data->ifi_obytes and ifa_data->ifi_ibytes) are stored from previous device reboot.
I don't know why, but ifi_opackets and ifi_...
How can I add timestamp to logs using Node.js library Winston?
...m any file I do var logger = require('./logger.js') and can then do logger.info('hello') from any file and get the same configuration of Winston.
– JHH
May 28 '15 at 8:58
...
How do I detect the Python version at runtime? [duplicate]
...
Sure, take a look at sys.version and sys.version_info.
For example, to check that you are running Python 3.x, use
import sys
if sys.version_info[0] < 3:
raise Exception("Must be using Python 3")
Here, sys.version_info[0] is the major version number. sys.version_i...
Detect Chrome extension first run / update
...ag there to mark all consequent runs as non-first.
Example, in background.htm:
var first_run = false;
if (!localStorage['ran_before']) {
first_run = true;
localStorage['ran_before'] = '1';
}
if (first_run) alert('This is the first run!');
EDIT: To check whether the extension has just been u...
How get integer value from a enum in Rails?
... the integer values for an enum from the class the enum is on:
Model.sale_infos # Pluralized version of the enum attribute name
That returns a hash like:
{ "plan_1" => 1, "plan_2" => 2 ... }
You can then use the sale_info value from an instance of the Model class to access the integer va...
Does pandas iterrows have performance issues?
...h():
ret = []
grouped = table2.groupby('letter', sort=False)
t2info = table2.to_records()
for index, letter, n1 in table1.to_records():
t2 = t2info[grouped.groups[letter].values]
# np.multiply is in general faster than "x * y"
maxrow = np.multiply(t2.number2, ...
ios app maximum memory budget
...s always here
}
- (float)__getMemoryUsedPer1
{
struct mach_task_basic_info info;
mach_msg_type_number_t size = sizeof(info);
kern_return_t kerr = task_info(mach_task_self(), MACH_TASK_BASIC_INFO, (task_info_t)&info, &size);
if (kerr == KERN_SUCCESS)
{
float used_...