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What is the volatile keyword useful for?
...isibility. Basically, the value of a volatile field becomes visible to all readers (other threads in particular) after a write operation completes on it. Without volatile, readers could see some non-updated value.
To answer your question: Yes, I use a volatile variable to control whether some code ...
Get Image Height and Width as integer values?
...Make sure that:
You specify the correct image path there
The image has read access
Chmod image dir to 755
Also try to prefix path with $_SERVER["DOCUMENT_ROOT"], this helps sometimes when you are not able to read files.
...
How to delete a specific line in a file?
...ne you want to delete:
with open("yourfile.txt", "r") as f:
lines = f.readlines()
with open("yourfile.txt", "w") as f:
for line in lines:
if line.strip("\n") != "nickname_to_delete":
f.write(line)
You need to strip("\n") the newline character in the comparison because ...
How to read contacts on Android 2.0
... that you have added
<uses-permission android:name="android.permission.READ_CONTACTS"/>
to your AndroidManifest.xml file, then you can loop through your phone contacts like this:
Cursor cursor = getContentResolver().query(ContactsContract.Contacts.CONTENT_URI,null, null, null, null);
whi...
How do I flush the cin buffer?
...
Possibly:
std::cin.ignore(INT_MAX);
This would read in and ignore everything until EOF. (you can also supply a second argument which is the character to read until (ex: '\n' to ignore a single line).
Also: You probably want to do a: std::cin.clear(); before this too to r...
An efficient way to transpose a file in Bash
...k (except old, broken awk of course - there YMMV).
The above solutions do read the whole file into memory though - if the input files are too large for that then you can do this:
$ cat tst.awk
BEGIN { FS=OFS="\t" }
{ printf "%s%s", (FNR>1 ? OFS : ""), $ARGIND }
ENDFILE {
print ""
if (AR...
How can I read inputs as numbers?
...the data received with input function, but Python 2's input function does (read the next section to understand the implication).
Python 2's equivalent of Python 3's input is the raw_input function.
Python 2.x
There were two functions to get user input, called input and raw_input. The difference b...
Creating a JavaScript cookie on a domain and reading it across sub domains
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Uncaught TypeError: Cannot read property 'msie' of undefined - jQuery tools
I am getting the following error in Chrome dev console:
12 Answers
12
...
Read properties file outside JAR file
... intializeLogger2();
testLogging();
}
public void readProperties() {
InputStream input = null;
try {
input = new FileInputStream(CONFIG_PROPERTIES_FILE);
this.properties.load(input);
} catch (IOException e) {
logge...