lines

问题 I have file consists of 10000 different lines. I need to take 100 random uniq lines from this file and write them to another file. What is the easiest way to do it using php? 回答1: A naive way: $lines = file('somefile.txt'); shuffle($lines); $random_lines = array_slice($lines, 0, 10); Note: This completely disregards system resource considerations. 回答2: A faster solution larger lines function m1($file) { $fp = fopen($file, "r"); $size = filesize($file); $list = array(); $n = 0; while ( true )

问题 I need to add labels with difference of 10 in both axis( one each between the grid ), WITHOUT compromising the present number of grids.So the number of grid lines should stay 11 and number of labels will go up to 21. Hope that clears my query.Above is my chart, and this is the code - var chart = AmCharts.makeChart("chartdiv", { "type": "xy", "dataProvider": json, "valueAxes": [ { "id":"my_y", "autoGridCount": false, "position": "right", "tickLength":0, "gridThickness":0.25, "minimum":-100,

问题 I have been tasked with turning this rough idea into a live page. While I have a basic structure established, I am wondering the best way to go about creating the curved lines that connect the months. Should I just create images and over lay them? Is there a way to draw them with some kind of scripting/coding? Canvas? I don't know the best way to do this. 回答1: I just put this together to show you that it is very possible and there are probably other ways to do it. #upper-line { border: solid

问题 This question already has an answer here : Read text from file skipping any spaces or empty lines (1 answer) Closed 5 years ago . Hi. I need to read several files without empty lines between words.They can have different layouts, such as 1.txt or 2.txt: 1.txt: treg hreger ig srg fre ig lre eg 2.txt: lregreg igregr kreggerg ereherh tershs hsehsteh asreh treshse How do i do that ? How can I count the number of words in the fastest way? I just have the following code: #include <stdio.h> #include

问题 I'm using matplotlib for drawing graphs such as smooth lines. it is not problem to draw for me, but I have problems with animations. import numpy as np import random as random from matplotlib import pyplot as plt from matplotlib import animation So, i have array, such as: a = [0,1,2,4,5,8,9,12,14,18,22,17,30,37,29,45] And I need to draw it smooth point-to-point. Now I have this strings: for i in range(len(a)-1): desty = np.append(desty,np.linspace(a[i],a[i+1],n)) destx = np.append(destx,np

问题 I'm getting trouble in making what I want morris.js charts to do. My goal is to be able to toggle specific lines based on input[type=checkbox] value. So far here's what I have done: JS code var morris = Morris.Line({ element: 'line-example', data: [ { y: '2006', a: 100, b: 90 }, { y: '2007', a: 75, b: 65 }, { y: '2008', a: 50, b: 40 }, { y: '2009', a: 75, b: 65 }, { y: '2010', a: 50, b: 40 }, { y: '2011', a: 75, b: 65 }, { y: '2012', a: 100, b: 90 } ], xkey: 'y', ykeys: ['a', 'b'], labels: [

问题 I have a macro that deletes lines based on a certain value in a column and then sorts them. It works fine. However, the worksheet starts with about 4000 rows and the macro ends up deleting about 2000 of them and it takes 1 minute 25 seconds to do it. I'm wondering if there's something I can do that will make it take a lot less time. Here's the code: 'remove numbers that are not allowed based on values in "LimitedElements" worksheet For i = imax To 1 Step -1 a = Sheets("FatigueResults").Cells

问题 So I'm pretty new to Perl, only been learning it for 1 week. I'm trying to read only a specific range of lines into an array. If I print $_ inside the if statement, it list exactly what i want stored into my array. But storing $_ into my array and then print @array outside the while shows nothing. I'm not sure what I should do. Reason why I'm trying to store it into an array is too get certain information from the columns, therefore needing an array to do so. Thanks for your help. Its

问题 I'm trying to read in a text file in a c# application, but I don't want to read the first two lines, or the last line. There's 8 lines in the file, so effectivly I just want to read in lines, 3, 4, 5, 6 and 7. Is there any way to do this? example file USE [Shelley's Other Database] CREATE TABLE db.exmpcustomers( fName varchar(100) NULL, lName varchar(100) NULL, dateOfBirth date NULL, houseNumber int NULL, streetName varchar(100) NULL ) ON [PRIMARY] EDIT Okay, so, I've implemented Callum

问题 I have two different functions in my program, one writes an output to a txt file (function A) and the other one reads it and should use it as an input (function B). Function A works just fine (although i'm always open to suggestions on how i could improve). It looks like this: def createFile(): fileName = raw_input("Filename: ") fileNameExt = fileName + ".txt" #to make sure a .txt extension is used line1 = "1.1.1" line2 = int(input("Enter line 2: ") line3 = int(input("Enter line 3: ") file =