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Why would a JavaScript variable start with a dollar sign? [duplicate]
...; // refers to the jQuery object representation of the dom object
var email_field = $("#email").get(0); // refers to the dom object itself
I find this to be very helpful in writing jQuery code and makes it easy to see jQuery objects which have a different set of properties.
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Xcode 5.1 - No architectures to compile for (ONLY_ACTIVE_ARCH=YES, active arch=x86_64, VALID_ARCHS=i
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What you need to do is just set the ONLY_ACTIVE_ARCH to NO (at least works for me). Below is a screenshot for it:
EDIT:
As far as I know (please point it out if there's something wrong, thanks), if you set ONLY_ACTIVE_ARCH to YES, it means the Xcode will only...
What is the purpose of using -pedantic in GCC/G++ compiler?
...s OK when I re-enable it (the one program that didn't was explicitly using __int128 types, which are pedantically incorrect). I think there was an intervening stage when GCC was too noisy (for my liking) with -pedantic. I just tested about 300 source files — some library code, some commands, som...
Does Javascript pass by reference? [duplicate]
...y value:
function replace(ref) {
ref = {}; // this code does _not_ affect the object passed
}
function update(ref) {
ref.key = 'newvalue'; // this code _does_ affect the _contents_ of the object
}
var a = { key: 'value' };
replace(a); // a still has its original value - it's un...
Where to store global constants in an iOS application?
...the "constants.h" approach, declaring static variables based on #ifdef VIEW_CONSTANTS ... #endif. So I have one application-wide constants file, but each of my other code files #defines different sets of constants to include before #include-ing the constants file (stops all those "defined but not us...
Python: Using .format() on a Unicode-escaped string
... @Kit: If you want all literals to be Unicode (like in Python 3), put from __future__ import unicode_literals at the beginning of your source files.
– Philipp
Jul 13 '10 at 8:47
1
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ie8 var w= window.open() - “Message: Invalid argument.”
...soft only allows the following arguments, If using that argument at all:
_blank
_media
_parent
_search
_self
_top
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How to convert SQL Query result to PANDAS Data Structure?
...r. 2015
As noted below, pandas now uses SQLAlchemy to both read from (read_sql) and insert into (to_sql) a database. The following should work
import pandas as pd
df = pd.read_sql(sql, cnxn)
Previous answer:
Via mikebmassey from a similar question
import pyodbc
import pandas.io.sql as psql
cn...
How to change the background color of the options menu?
...">
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<item name="android:itemBackground">@color/overflow_background</item>
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</style>
Tested from API 4.2 to 5.0.
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Encrypt & Decrypt using PyCrypto AES 256
...rt Random
from Crypto.Cipher import AES
class AESCipher(object):
def __init__(self, key):
self.bs = AES.block_size
self.key = hashlib.sha256(key.encode()).digest()
def encrypt(self, raw):
raw = self._pad(raw)
iv = Random.new().read(AES.block_size)
...