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What and where are the stack and heap?
...iables and some bookkeeping data. When that function returns, the block becomes unused and can be used the next time a function is called. The stack is always reserved in a LIFO (last in first out) order; the most recently reserved block is always the next block to be freed. This makes it really ...
Save PL/pgSQL output from PostgreSQL to a CSV file
...mething easy to re-use or automate, you can use Postgresql's built in COPY command. e.g.
Copy (Select * From foo) To '/tmp/test.csv' With CSV DELIMITER ',' HEADER;
This approach runs entirely on the remote server - it can't write to your local PC. It also needs to be run as a Postgres "superuser"...
How do I record audio on iPhone with AVAudioRecorder?
...ing KVC.
#define DOCUMENTS_FOLDER [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]
- (void) startRecording{
UIBarButtonItem *stopButton = [[UIBarButtonItem alloc] initWithTitle:@"Stop" style:UIBarButtonItemStyleBordered target:self action:@selector(stopRecording)];
self.navigatio...
Git push error '[remote rejected] master -> master (branch is currently checked out)'
...e folder contains only the actual repository data).
Execute the following command in your remote repository folder:
git config --bool core.bare true
Then delete all the files except .git in that folder. And then you will be able to perform git push to the remote repository without any errors.
...
Retain cycle on `self` with blocks
...ck, either use a property instead or use bself->ivar.
Addendum: When compiling as ARC, __block no longer breaks retain cycles. If you're compiling for ARC, you need to use __weak or __unsafe_unretained instead.
share
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Naming returned columns in Pandas aggregate function? [duplicate]
...f.columns.ravel()]
For example:
import pandas as pd
import pandas.rpy.common as com
import numpy as np
data = com.load_data('Loblolly')
print(data.head())
# height age Seed
# 1 4.51 3 301
# 15 10.89 5 301
# 29 28.72 10 301
# 43 41.74 15 301
# 57 52.70 20 301
...
What's the difference between dependencies, devDependencies and peerDependencies in npm package.json
...ore 3.0: are always installed if missing, and raise an error if multiple incompatible versions of the dependency would be used by different dependencies.
expected to start on 3.0 (untested): give a warning if missing on npm install, and you have to solve the dependency yourself manually. When runnin...
How to detect incoming calls, in an Android device?
I'm trying to make an app like, when a call comes to the phone I want to detect the number. Below is what I tried, but it's not detecting incoming calls.
...
Volatile Vs Atomic [duplicate]
...AtomicInteger uses some special utilities -- specifically including Unsafe.compareAndSwapInt -- to do more powerful concurrent operations safely.
– Louis Wasserman
Nov 2 '13 at 17:21
...
How to change the name of a Django app?
...s.py files.
Edit the database table django_content_type with the following command: UPDATE django_content_type SET app_label='<NewAppName>' WHERE app_label='<OldAppName>'
Also if you have models, you will have to rename the model tables. For postgres use ALTER TABLE <oldAppName>_m...